A stair case contains ten steps each 10cm high and 20 cm wide. The minimum horizontal velocity with which the ball has to be rolled off the upper most step, so as to hit directly the edge of the lowest steps is (approximately)

A stair case contains ten steps each 10cm high and 20 cm wide. The min

1.	A stair case contains ten steps each 10cm high and 20 cm wide. The minimum horizontal velocity with which the ball has to be rolled off the upper most step, so as to hit directly the edge of the lowest steps is (approximately)
Answer» `42 MS^(-1)` `4.2 ms^(-1)` `24 ms^(-1)` `2.4 ms^(-1)` ANSWER :B