Question

12. A ball is thrown upward with speed 10 m/s from the
top of the tower reaches the ground with a speed
20 m/s. The height of the tower is [Take g = 10 m/s21
(1) 10 m
(2) 15 m
(3) 20 m
(4) 25 m

Answer 1

Answer:

15m

Explanation:

at the topmost point velocity will be zero from there to ground velocity is 20m/s apply v^2-u^2=2as

(a=g)

Answer 2

Explanation:

the answer of this question is 15m