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A body is projected horizontally from a ...

A body is projected horizontally from a height of 78.4 m with a velocity `10 ms^(-1)`. Its velocity after 3 seconds is - `(g = 10 ms^(-2)]` (Take direction of projection on `veci` and vertically upward direction on `vecj)`

A

` 10 hat i - 30 hat j`

B

`10 hat i + 30 hat j`

C

`20 hat - 30 hat j`

D

`10 hat i + 10 sqrt(3) hat j`

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The correct Answer is:
A
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