From the top of the tower of height 50m, a ball is thrown vertically upwards, if it hit the ground after 10 sec then velocity of projection of ball is:

20 m/s

20 m/s

0%

40 m/s

40 m/s

0%

45 m/s

45 m/s

0%

90 m/s

90 m/s

0%