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Rohan

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Sep 15, 2010, 6:00:18 AM9/15/10
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Two people start swimming from the opposite ends of a swimming pool
simultaneously. They meet at a distance of 410 m from one of the ends
and continue swimming further till they reach the opposite ends. They
take rest for 1 hr each and then start off the return journey. Now
they meet at a distance of 230 m from the other end. Find the length
of the pool.

saurabh aggarwal

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Sep 15, 2010, 6:19:07 AM9/15/10
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1000m ???

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Rohan Aggarwal

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Sep 15, 2010, 6:20:33 AM9/15/10
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yeah solution plz? this is from unproc 10... i hav a doubt in solution

saurabh aggarwal

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Sep 15, 2010, 6:29:48 AM9/15/10
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speed of A = a
speed of B = b
length of pool = x
At first meeting point....
410/a = (x-410)/b
=> b/a = (x-410)/410  
 
At second meeting point....
(x-410+230)/a = (410+x-230)/b
 
solve for x using value of b/a from first..... x comes out to be 1000

Rohan Aggarwal

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Sep 15, 2010, 6:42:35 AM9/15/10
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in the 2nd eqn i meant

On Wed, Sep 15, 2010 at 4:12 PM, Rohan Aggarwal <jiit....@gmail.com> wrote:
yeah in this.... wil the time taken be the same ? it is not necc that they stopped for an hour at the same time....

Rohan Aggarwal

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Sep 15, 2010, 6:42:22 AM9/15/10
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yeah in this.... wil the time taken be the same ? it is not necc that they stopped for an hour at the same time....

saurabh aggarwal

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Sep 15, 2010, 6:48:31 AM9/15/10
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In my opinion it doesn't matter when they stopped...travel time is same for both and rest time is also same....only difference is in distance covered which depends on their speed only.....

vik...@gmail.com

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Sep 15, 2010, 6:49:55 AM9/15/10
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I think we need to take the time diff of them reaching end points , as their speeds are diffrnt.....B>A.....then we need to consider the dist covrd by B wen A was resting....

Bt coincidently both the methods gave same sol.

Sent on my BlackBerry® from Vodafone

From: Rohan Aggarwal <jiit....@gmail.com>
Date: Wed, 15 Sep 2010 16:12:22 +0530
Subject: Re: ques

Rohan Aggarwal

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Sep 15, 2010, 6:55:37 AM9/15/10
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no their travel time isnt necc the same... their speeds r differnt... so v cnt compare.. i think the soln might be wrng... or coincidntly givin the same ans... their travel time wil only be the same when they reach their end points at the same time... which is not given.

saurabh aggarwal

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Sep 15, 2010, 8:31:15 AM9/15/10
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if the time taken by both from first meeting point till second meeting point is same and rest time is also same  then how can the travel time be different.....

Rohan Aggarwal

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Sep 15, 2010, 9:25:42 AM9/15/10
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yeah got that.. sorry :)

vik...@gmail.com

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Sep 15, 2010, 9:35:02 AM9/15/10
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If both the travel time is same , then why on the return journey they are not meeting at the same point.... If their speeds are different , den how d time is same ???

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From: saurabh aggarwal <coolsau...@gmail.com>
Date: Wed, 15 Sep 2010 18:01:15 +0530

Rohan Aggarwal

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Sep 15, 2010, 9:38:07 AM9/15/10
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time wil be time... their distnces wil differ... they both stopd for one hour each.... so their travel time has to be same....distances r diff thou....
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