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A ball dropped from 9th stair of multi s...

A ball dropped from 9th stair of multi storied building reaches the ground in 3 sec. In the first second of its free fall, it passes through n stairs then n equal to

A

1

B

2

C

3

D

4

Text Solution

Verified by Experts

The correct Answer is:
A
`nh = (1)/(2)gt^(2)`, h = height of each story (constant)
`n prop t^(2)`
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