The boy on the tower (20 m) throws a ball a distance of 60 m. At what speed, in m/s, is the ball thrown?

Question

Please Help!!
Thanks!!

Answer 1

I have to assume the ball was thrown horizontally.

Find the time for a ball 20 m high to hit the ground
h=1/2 g t^2

then, 60m=velocity*time solve for velocity