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A man standing on the edge of the terrac...

A man standing on the edge of the terrace of a high rise building throws a stone, vertically up with at speed of `20 m//s`. Two seconds later, an identical stone is thrown vertically downwards with the same speed of `20 m`,. Then

A

The first stone hits the ground after `4` seconds.

B

The second ball. Was projected vertically downwards with speed `5 m//s`.

C

The distance travelled by the first ball is `10 m` greater than the distance travelled by the second ball.

D

Both balls hit the ground with same velocities

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A, C, D
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