(P/S) the total distance : Quant Question Archive [LOCKED]
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# (P/S) the total distance

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Manager
Joined: 02 Apr 2006
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10 Dec 2007, 05:19
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

It sounds simple, but I failed to get the right answer. Please let me know the solution to get the right number..

Q. A ball is dropped from a height of 36 meters. It rebounds 2/3 of its fallen distance. And what is the total distance it has moved until it drops three times to the ground?

The question sounds somewhat strange bc it has been translated..
The OA that I been given is 116.
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Joined: 14 Nov 2007
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10 Dec 2007, 07:37
36+2*(36*2/3)+2*(36*2/3*2/3)=36+2*24+2*(24*2/3)=36+48+32=116
I suppose that you forgot to multiply on 2 - this is the distance of the ball comming not only up, but also down.
VP
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Re: (P/S) the total distance [#permalink]

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10 Dec 2007, 07:41
pretttyune wrote:
It sounds simple, but I failed to get the right answer. Please let me know the solution to get the right number..

Q. A ball is dropped from a height of 36 meters. It rebounds 2/3 of its fallen distance. And what is the total distance it has moved until it drops three times to the ground?

dropped: 36
first bounce up+back down: 36*2/3=24+24
second bounce up and back down: 24*2/3=16+16
so three drops total:
36+24*2+16*2=116
Director
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Re: (P/S) the total distance [#permalink]

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10 Dec 2007, 09:08
pretttyune wrote:
It sounds simple, but I failed to get the right answer. Please let me know the solution to get the right number..

Q. A ball is dropped from a height of 36 meters. It rebounds 2/3 of its fallen distance. And what is the total distance it has moved until it drops three times to the ground?

The question sounds somewhat strange bc it has been translated..
The OA that I been given is 116.

1st time:
36 down = 36

2nd time:
2/3*36 = 24 up and 24 down = 48

3rd time:
2/3*24 = 16 up and 16 down = 32

Total = 36+48+32 = 116
Re: (P/S) the total distance   [#permalink] 10 Dec 2007, 09:08
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