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A particle is projected upwards with a v...

A particle is projected upwards with a velocity of 110m/sec at an angle of `60^(@)` with the vertical. Find the time when the particle will move perpendicular to its initial direction, taking g `=10m//sec^(2)`

A

10 seconds

B

22 seconds

C

5 secomds

D

`10 sqrt(3)` seconds

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The correct Answer is:
B
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