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pretttyune
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(P/S) the total distance 10 Dec 2007, 06:19
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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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Kastel
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(P/S) the total distance 10 Dec 2007, 08:37
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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.
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Ravshonbek
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(P/S) the total distance 10 Dec 2007, 08:41
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pretttyune
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?
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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
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GK_Gmat
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(P/S) the total distance 10 Dec 2007, 10:08
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pretttyune
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.
Show more


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



Archived Topic
Hi there,
This topic has been closed and archived due to inactivity or violation of community quality standards. No more replies are possible here.
Where to now? Join ongoing discussions on thousands of quality questions in our Quantitative Questions Forum
Still interested in this question? Check out the "Best Topics" block above for a better discussion on this exact question, as well as several more related questions.
Thank you for understanding, and happy exploring!