$Y $ component of velocity is $20$ and $X$ component of velocity is $10$. The direction of motion of the body with the horizontal at this instant is
$Y $ component of velocity is $20$ and $X$ component of velocity is $10$. The direction of motion of the body with the horizontal at this instant is
- A
${\tan ^{ - 1}}(2)$
- B
${\tan ^{ - 1}}(1/2)$
- C
$45^°$
- D
$0^°$
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