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A ball is projected from ground with a v...

A ball is projected from ground with a velocity `V` at an angle `theta` to the vertical. On its path it makes an elastic collison with a vertical wall and returns to ground. The total time of flight of the ball is

A

`(2 upsilon sin theta)/(g)`

B

`(2 upsilon cos theta)/(g)`

C

`(upsilon sin 2 theta)/(g)`

D

`(upsilon cos theta)/(g)`

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The correct Answer is:
B
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