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A particle moves on the curve y = x^(2)...

A particle moves on the curve ` y = x^(2)/4 ` where x=t/2.
x and y are meausured in metre and t in second. At t=4s the velocity of particel is

A

`1/sqrt2 m//s`

B

`sqrt3 m//s`

C

`sqrt2 m//s`

D

`2sqrt2 m//s`

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The correct Answer is:
A
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