Question

A body dropped from top of a tower fall through 40 m during the last two seconds of its fall. The height of tower is (g = 10 m/s²)

(a) 60 m

(b) 45 m

(c) 80 m

(d) 50 m.

Answer 1

Correct option (b) 45 m

Explanation:

Let h be height of the tower and t is the time taken by the body to reach the ground.

Here, u = 0, a = g

Distance covered in last two seconds is