A student goes to the a 100 m high floor of Kutubmeenar at Delhi. To verify the law of gravity, he starts from a window with zero initial velocity, with a stop watch in his hand. After 3.0 s, Batman comes to the same floor and jumps to save the boy. What must be his initial velocity so that he'll just be able to save the boy. Assume free fall for both boy and Batman before he catches the boy. Take `g = 10m//s^(2)`

Answer

`[60.5 m//s]`