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Position of a particle varies with time ...

Position of a particle varies with time (t) as `x= (2t^2 - 5t^3)m` in a straight line. The average acceleration of the particle in the interval t = 1 to t= 3 sec will be

A

`-11 m/s^2`

B

`-56 m/s^2`

C

`-86 m/s^2`

D

`-30 m/s^2`

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The correct Answer is:
B
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