Thursday, 14 July 2016

A ball is dropped from a height of 96 feet and it rebounds 2/3 of the height it falls. If it continues to fall and rebound, find the total distance that the ball can travel before coming to rest? 

a.240 ft b 360 ft c.480 ft d.none of these

Here is a trick if ball rebounds for 2/3 or for any other fraction (p/q) like 3/4, 1/2 or 5/2 
then use this (p+q)*height.
so we get, according to this question,

(2+3)*96= 480 Feet.

Another Trick:
96(1+r)/(1-r)=96(5/3)/(1/3)=480

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