Question

After striking a floor a certain ball rebounds $4╱5^{th}$ of the height from which it has fallen. Find the total distance that it travels before coming to rest, if it is gently dropped from a height of $120$ maters.

Answer 1

Ans.The ball rebounds to a/b length where a/b in this case is 4/5, so total distance covered will be $height\ast (a+b)/(a-b)$
$120\times \frac{(4+5)}{|(4–5)|}=1080$