1.

A body dropped from the top of tower covers a distance 9 x in the last second of its journey, where x is the distance covered in the first second. How much time does it take to reach the ground.A. 5 sB. 4 sC. 3 sD. 6 s

Answer» Correct Answer - A
`9x=(9)/(2)(2n-1)` .(1)
`x=(1)/(2)g(1)^(2)` .(2)
from (1) and (2)
`n=5`


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