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A particle is projected with velocity 2s...

A particle is projected with velocity `2sqrt(gh)` and at an angle `60^@` to the horizontal so that it just clears two walls of equal height 'h' which are at a distance 2h from each other. The time taken by the particle to travel between these two walls

A

`s sqrt(2h/g)`

B

`sqrt (h/2g)`

C

`2sqrt (h/g)`

D

`sqrt (h/g)`

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