If the particle is moving along a straig...

If the particle is moving along a straight line given by the relation `x=2-3t +4t^3` where s is in cms., and t in sec. Its average velocity during the third sec is

A

73 cm/s

B

80 cm/s

C

85 cm/s

D

90 cm/s

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The correct Answer is:

A

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