A ball is projected upwards from the top of a tower with a velocity `50ms^-1` making an angle `
Channel: Doubtnut
Date: 2020-07-12

A ball is projected upwards from the top of a tower with a velocity `50ms^-1` making an angle `30^@` with the horizontal. The height of tower is 70m. After how many seconds from the instant of throwing, will the ball reach the ground. `(g=10 ms^-2)`