A bullet fired vertically up from the ground reaches a height 40 m in its path from the

A bullet fired vertically up from the ground reaches a height 40 m in its path from the ground and it takes further time 2 seconds to reach the same point during descent. The total time of flight is ?

(1) 8s (2) 4s (3) 3s (4) 6s

Solution-

Using,

Simplying,

For a given value of h the above equation gives two solution t1 and t2,

Option (4) 6 sec