Aptitude - A ball is dropped from a height of 10 feet. Every time it rebounces to half of the height. how many

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A ball is dropped from a height of 10 feet. Every time it rebounces to half of the height. how many feet it traveled?

Total Answers and Comments: 9

Last Update: June 07, 2008

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Best Rated Answer

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Submitted by: AjayLebaka

30 feet.

Above answer was rated as good by the following members:
soumendas

March 26, 2005 14:56:39

AjayLebaka

RE: A ball is dropped from a height of 10 feet. Every time it rebounces to half of the height. how many ...

30 feet.

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Overall Rating: +1

July 24, 2005 14:03:55

yousuf

RE: A ball is dropped from a height of 10 feet. Every time it rebounces to half of the height. how many ...

ans is 20 feet.
its aproblem on sum of infinite gp with first term a 10 and common raio r 1/2.
formula used is a/(1-r)

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August 11, 2005 06:54:51

Palanisamy

RE: A ball is dropped from a height of 10 feet. Every time it rebounces to half of the height. how many ...

Ans is 30 feet.

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October 17, 2005 10:19:51

Ravindra Garg

RE: A ball is dropped from a height of 10 feet. Every ...

Sn a/(1-r)a 5n infinityr 1/2total 10+2*Sn 30feet

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March 29, 2006 05:40:22

RE: A ball is dropped from a height of 10 feet. Every ...

it can't be calculated

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April 28, 2006 07:09:18

vineet saxena

RE: A ball is dropped from a height of 10 feet. Every ...

20 feet

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October 14, 2006 00:17:42

kiran

RE: A ball is dropped from a height of 10 feet. Every ...

Ans is 30 Ft

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August 15, 2007 15:24:58

smitha

RE: A ball is dropped from a height of 10 feet. Every ...

Hi friends
How can it be GP? I mean to say the series comes in this way 10 5 5 2.5 2.5 .......

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June 07, 2008 14:33:37

bijeshcnair

Member Since: June 2008 Contribution: 2

RE: A ball is dropped from a height of 10 feet. Every time it rebounces to half of the height. how many feet it traveled?

clearly this series can form a GP..like this
10+5+5+2.5+2.5+......
>
10+2(5/1-1/2)
which will gives you 30 as the answer..
do add replies if there is any mistake

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