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A particle moves according to the law X ...

A particle moves according to the law `X =a cos (pi t)/2` . The distance covered by it in the time interval between t = 0 to 1 = 3 sec is 

A

` 2a `

B

`3 a`

C

`4 a`

D

`a`

Text Solution

Verified by Experts

The correct Answer is:
B
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