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A ball is thrown from ground such that i...

A ball is thrown from ground such that it just crosses two poles of equal height kwpt 80 m apart. The maximum height attained by the ball is 80 m. When the ball passes the first pole, its velocity makes `45^(@)` with horizontal. The correct alternatives is/are :- `(g=10 m//s^(2))`

A

Time interval between the two poles is 4s.

B

Height of the pole is 60 m.

C

Range of the ball is 160 m.

D

Angle of projection is `tan^(-1) (2)` with horizontal.

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The correct Answer is:
A, B, C, D
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