Question

S A ball is thrown vertically upward. From the top of tower with velocity 10m/s .The ball reaches the ground with a velocity of 30m/s. What is the height of tower?
Take g=10m/sec

Answer 1

Using equation:
2gS = Vf^2 - Vi^2
20S = 900 - 100
20S = 800
S = 40m
This is ur answer friend...