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The speed of abody moving along a circle...

The speed of abody moving along a circle of radius 15 cm changes from 180 rev/min to 600 rev/min in 11 s. Then the angular acceleration of the body will be

A

`1 rad//s^2`

B

`2 rad//s^2`

C

3 rad //s^2`

D

`4 rad//s^2`

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