A body is thrown vertically upwards from `A`. The top of a tower . It reaches the ground in time `t_(1)`. It it is thrown vertically downwards from `A` with the same speed it reaches the ground in time `t_(2)`, If it is allowed to fall freely from `A`. then the time it takes to reach the ground.
.

Options

A. `t=(t_1+t_2)/2`
B. `t=(t_1-t_2)/2`
C. `t=sqrt (t_1t_2)`
D. `t=sqrtt_1/t_2`

Answer

C