FAO: Maths People

roj279 · June 2007

Right, today in my phycics lesson our teacher said he would give the person who could solve the following question 20 quid! here it is

3 men do a job in different times

Chris - 2 days
Tom - 4 days
James - 6 days

How long would it take if they all did the job together?
its Between 1 and 3 and isnt 2, and it is a number with 2 decimal places. For example it could be 1.45

Any ideas? thanks[:D]

<center> rhythm </center>

ultimatebassist31 · June 2007

I'll help if i get the 20 quid. And you pay posting

<hr noshade size="1"><center>I'm certainly not selling this frame</center><center>Woburn</center><center>Fit</center><div align="right">Myspace</div id="right">

roj279 · June 2007

i was waiting for somebody to say something along those lines[V]

<center> rhythm </center>

mmm_pie · June 2007

That question seems to make no sense. I can't remember any like that in physics, even way back pre GCSE.

>>>> Torrent is acomin' >>>>>

<blockquote id="quote">quote:<hr height="1" noshade id="quote">Originally posted by haleybunny

Sometimes it overheats. You have to make sure it's in a ventilated place all the time.
<hr height="1" noshade id="quote"></blockquote id="quote">

ultimatebassist31 · June 2007

<blockquote id="quote">quote:<hr height="1" noshade id="quote">Originally posted by mmm_pie

That question seems to make no sense. I can't remember any like that in physics, even way back pre GCSE.

>>>> Torrent is acomin' >>>>>

<blockquote id="quote">quote:<hr height="1" noshade id="quote">Originally posted by haleybunny

Sometimes it overheats. You have to make sure it's in a ventilated place all the time.
<hr height="1" noshade id="quote"></blockquote id="quote">
<hr height="1" noshade id="quote"></blockquote id="quote">

I don't think its actually to do with Physics, i think its just one of those stupid things that teachers do to get students excited. Never worked with me, they usually got the finger or something along those lines.

<hr noshade size="1"><center>I'm certainly not selling this frame</center><center>Woburn</center><center>Fit</center><div align="right">Myspace</div id="right">

roj279 · June 2007

it doesnt have anything to do with physics, he just set us it in the lesson

<center> rhythm </center>

mmm_pie · June 2007

Probably the average divided by the number of workers then. So 4/3. Or 1.33.

>>>> Torrent is acomin' >>>>>

<blockquote id="quote">quote:<hr height="1" noshade id="quote">Originally posted by haleybunny

Sometimes it overheats. You have to make sure it's in a ventilated place all the time.
<hr height="1" noshade id="quote"></blockquote id="quote">

Tartanyak · June 2007

1 hour
5 minutes
27.27 seconds.

Or thereabouts.

Want working?

<center>Quote from November
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mmm_pie · June 2007

<blockquote id="quote">quote:<hr height="1" noshade id="quote">Originally posted by Tartanyak

1 hour
5 minutes
27.27 seconds.

Or thereabouts.

Want working?

<center>Quote from November
Then your book is probably a very short prejudiced one that does not show a sense of humour. I bet it didn't get very good reviews.
Camp Commuter
Junkbike, junkbike, dernernernutnernut</center>
<hr height="1" noshade id="quote"></blockquote id="quote">
How on earth did you get to that?

>>>> Torrent is acomin' >>>>>

<blockquote id="quote">quote:<hr height="1" noshade id="quote">Originally posted by haleybunny

Sometimes it overheats. You have to make sure it's in a ventilated place all the time.
<hr height="1" noshade id="quote"></blockquote id="quote">

Tartanyak · June 2007

Oh, that's 1.0909090909 by the way...

The method:

This job can be done in 2, 4, and 6 hours. First work out an imaginary total of 'effort' this takes. To work out how much each man can do in an hour, it has to be a number divisible by 2, 4 and 6.

So, 12. The job takes 12 'effort'. The guy who does it in 6 hours does 2 effort per hour. The one in 4 does 3effort/hr and the one in 2 does 6effort/hr.

Get me so far?

So, all three together will do 6 + 3 + 2 = 11 effort/hr.

As the job is 12 'effort', all three will do 11 in an hour, so that leaves just 1 effort left over.

1/11 (the time it takes to do one effort for 3 people) is 0.0909090909 recurring. So, 1.0909090909 hours in total.

It is damn good physics if you ignore the story and concentrate on the method.

<center>Quote from November
Then your book is probably a very short prejudiced one that does not show a sense of humour. I bet it didn't get very good reviews.
Camp Commuter
Junkbike, junkbike, dernernernutnernut</center>

rubber side up · June 2007

*head explodes*

<hr noshade size="1"><center><blockquote id="quote">quote:<hr height="1" noshade id="quote">Originally posted by EvilAlex

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JinjaNinja · June 2007

It would take just over 2 hours. Its only a one man job, so chris would do it and the others would just get in the way and slow him down a bit.

Lateral thinking baby.

Say that and I guarante you'll get some dosh (yes I want some)

<hr noshade size="1"><center>Originally posted by John

It'll be like being tw<s></s>ated in the face by the 60s.</center>

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roj279 · June 2007

he said to look at it in the way that james is 2 hours slower than Tom and 4 slower than Chris, and tom is 2 hours slower than chris but 2 faster than james, if that makes and sense:S?

<center> rhythm </center>

JinjaNinja · June 2007

I'm sticking with 1 man job. Teachers ain't going to give you money for somthing that streight forwards.

<hr noshade size="1"><center>Originally posted by John

It'll be like being tw<s></s>ated in the face by the 60s.</center>

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Tartanyak · June 2007

How you mean Mr Ninja?

<center>Quote from November
Then your book is probably a very short prejudiced one that does not show a sense of humour. I bet it didn't get very good reviews.
Camp Commuter
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JinjaNinja · June 2007

Its a lateral thinking question (IMO)

If the "job" is a one man job, then its not gong to get done any faster with 2 or 3 people. The answer would be 2 hours, as Chris, the fastest would be the one doing the work, and the others would either do nothing or (chuck in a bit of the old "too many chefs.." and get in the way, you get just over.

If i were a physic's teacher giving away money on a physics question, i'd do that.

<hr noshade size="1"><center>Originally posted by John

It'll be like being tw<s></s>ated in the face by the 60s.</center>

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Tartanyak · June 2007

I'm not sure... Looking into the mind of the physics teacher...

He didn't specify the job, so it could be a task that can easily be split between people (like, licking envelopes).
It looks like he's given them the 'is 1 < #.## < 3' hint to steer them away from that idea.

<center>Quote from November
Then your book is probably a very short prejudiced one that does not show a sense of humour. I bet it didn't get very good reviews.
Camp Commuter
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JinjaNinja · June 2007

Possibly, I'd still go lateral, that way you know your right in your own mind!

<hr noshade size="1"><center>Originally posted by John

It'll be like being tw<s></s>ated in the face by the 60s.</center>

<center>Join us HERE!</center>

mmm_pie · June 2007

<blockquote id="quote">quote:<hr height="1" noshade id="quote">Originally posted by Tartanyak

Oh, that's 1.0909090909 by the way...

The method:

This job can be done in 2, 4, and 6 hours. First work out an imaginary total of 'effort' this takes. To work out how much each man can do in an hour, it has to be a number divisible by 2, 4 and 6.

So, 12. The job takes 12 'effort'. The guy who does it in 6 hours does 2 effort per hour. The one in 4 does 3effort/hr and the one in 2 does 6effort/hr.

Get me so far?

So, all three together will do 6 + 3 + 2 = 11 effort/hr.

As the job is 12 'effort', all three will do 11 in an hour, so that leaves just 1 effort left over.

1/11 (the time it takes to do one effort for 3 people) is 0.0909090909 recurring. So, 1.0909090909 hours in total.

It is damn good physics if you ignore the story and concentrate on the method.

<center>Quote from November
Then your book is probably a very short prejudiced one that does not show a sense of humour. I bet it didn't get very good reviews.
Camp Commuter
Junkbike, junkbike, dernernernutnernut</center>
<hr height="1" noshade id="quote"></blockquote id="quote">
Where on earth did the 3 come from? I think you've overcomplicated things.

>>>> Torrent is acomin' >>>>>

<blockquote id="quote">quote:<hr height="1" noshade id="quote">Originally posted by haleybunny

Sometimes it overheats. You have to make sure it's in a ventilated place all the time.
<hr height="1" noshade id="quote"></blockquote id="quote">

Tartanyak · June 2007

The 3 was from the guy who does the job in 4 hours. 12/3 = 4.

<center>Quote from November
Then your book is probably a very short prejudiced one that does not show a sense of humour. I bet it didn't get very good reviews.
Camp Commuter
Junkbike, junkbike, dernernernutnernut</center>

Tartanyak · June 2007

P.S. It's not complicated and it's for œ20!

<center>Quote from November
Then your book is probably a very short prejudiced one that does not show a sense of humour. I bet it didn't get very good reviews.
Camp Commuter
Junkbike, junkbike, dernernernutnernut</center>

andy_spencer · June 2007

<blockquote id="quote">quote:<hr height="1" noshade id="quote">Originally posted by Tartanyak

Oh, that's 1.0909090909 by the way...

The method:

This job can be done in 2, 4, and 6 hours. First work out an imaginary total of 'effort' this takes. To work out how much each man can do in an hour, it has to be a number divisible by 2, 4 and 6.

So, 12. The job takes 12 'effort'. The guy who does it in 6 hours does 2 effort per hour. The one in 4 does 3effort/hr and the one in 2 does 6effort/hr.

Get me so far?

So, all three together will do 6 + 3 + 2 = 11 effort/hr.

As the job is 12 'effort', all three will do 11 in an hour, so that leaves just 1 effort left over.

1/11 (the time it takes to do one effort for 3 people) is 0.0909090909 recurring. So, 1.0909090909 hours in total.

It is damn good physics if you ignore the story and concentrate on the method.

<center>Quote from November
Then your book is probably a very short prejudiced one that does not show a sense of humour. I bet it didn't get very good reviews.
Camp Commuter
Junkbike, junkbike, dernernernutnernut</center>
<hr height="1" noshade id="quote"></blockquote id="quote">

I love that, seems to make sense aswell! + Gives a reasonable answer.

Kona Blast

fleabag · June 2007

I second teh Yak.

Thats my answer, even if he got there first, the ba<s></s>stard

[:D]

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JinjaNinja · June 2007

Did you get the œ20, what was teh answer?

<hr noshade size="1"><center>Originally posted by John

It'll be like being tw<s></s>ated in the face by the 60s.</center>

<center>Join us HERE!</center>

Tartanyak · June 2007

Yeah... I demand to have closure! I wanna know if my 2 or 3 seconds of thinking made you œ20 [:)]

<center>Quote from November
Then your book is probably a very short prejudiced one that does not show a sense of humour. I bet it didn't get very good reviews.
Camp Commuter
Junkbike, junkbike, dernernernutnernut</center>

JinjaNinja · June 2007

I wan't to know wether the b/s answer i gave worked!

<hr noshade size="1"><center>Originally posted by John

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roj279 · June 2007

the fucker wasnt in today, but the answer im going to take him is 1.086 days, my Dad did it, and it involves alot of fractions. I will take him all your answers aswell and see how it goes.

<center> rhythm </center>

JinjaNinja · June 2007

Don't forget to let us know! (that I was right [:D]

<hr noshade size="1"><center>Originally posted by John

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roj279 · June 2007

Jinja your asnwer must be rong, becuase if 1 person can do it in 2 days, then even the other 2 helping him in the slighest will make then time shorter. Therefore it taking less than two days

<center> rhythm </center>

JinjaNinja · June 2007

Your just looking at it the wrong way to get my answer, thats all. When you give the teacher my answer say its "lateral thinking". They will be impressed!

<hr noshade size="1"><center>Originally posted by John

It'll be like being tw<s></s>ated in the face by the 60s.</center>

<center>Join us HERE!</center>

Tartanyak · June 2007

Lateral thinking doesn't exist.

<center>Quote from November
Then your book is probably a very short prejudiced one that does not show a sense of humour. I bet it didn't get very good reviews.
Camp Commuter
Junkbike, junkbike, dernernernutnernut</center>

FAO: Maths People

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