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A body of mass 10 kg is being acted upon...

A body of mass 10 kg is being acted upon by a force `3t^2` and an opposing constant force of 32 N. The initial speed is `10 ms^-1.`The velocity of body after 5 s is

A

`2.5 m//s`

B

`3.5 m//s`

C

`5.0 m//s`

D

`6.5m//s`

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The correct Answer is:
D
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