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The distance travelled s in metres by a ...

The distance travelled `s` in metres by a particle in `t` second is given by `s=t^(3)+2t^(2)+t`. The speed of the particle after `1s` will be

A

`8 cm//"sec"`

B

`6 cm//"sec"`

C

`2 cm//"sec"`

D

None of these

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The correct Answer is:
A
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