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Two seconds after projection, a projecti...

Two seconds after projection, a projectile is moving at `30^(@)` above the horizontal . After one more second it is moving horizontally. If `g=10ms^(-2)`, the velocity of projection is

A

`10 sqrt(3) ms^(-1)`

B

20 m/s

C

10 m/s

D

`20 sqrt(3)` m/s

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The correct Answer is:
D
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