A graph of acceleration versus time of a...

A graph of acceleration versus time of a particle starting from rest at ` t=0` is as shown in figure. The speed of the particle at ` t = 14s` is

A

`2ms ^(-1)`

B

`34ms ^(-1)`

C

`20ms ^(-1)`

D

`42ms ^(-1)`

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The correct Answer is:

B

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