a ball is dropped from a height of hundred mm each time he hit the ground it bounce up to a height that is 3/10 of the previous heights how high will the ball bands

1 answer

There has to be more to this question.

If not and you mean to have it stand as is .....
(3/10) of 100 mm = 30 mm = 3 cm

100 mm is only 10 cm. Are you sure that's what you want ?