A man is standing on top of a building 100 m high. He throws two ball vertically, one at `t=0` and
Channel: Doubtnut
Date: 2020-07-26

A man is standing on top of a building 100 m high. He throws two ball vertically, one at `t=0` and after a time interval (less than 2 seconds). The later ball is thrown at a velocity of half the first. At `t=2`, both the balls reach to their and second ball is `+15m`.  Q. The speed of first ball is