Question

3. A balloon is rising up with a velocity of 30m/s. A stone is dropped from it and it reaches the ground in

15 sec. What is the height of the balloon when the stone was dropped from it?

A) 640m

B) 645m

C) 652.5m

D) 650m​

Answer 1

Answer:

correct answer is B)645m.

Answer 2

Answer:

This is a question of kinematics