A fan is making $600$ revolutions per minute. If after some time it makes $1200 $ revolutions per minute, then increase in its angular velocity is
A fan is making $600$ revolutions per minute. If after some time it makes $1200 $ revolutions per minute, then increase in its angular velocity is
- A
$10\,\pi \,rad/\sec $
- B
$20\,\pi \,rad/\sec $
- C
$40\,\pi \,rad/\sec $
- D
$60\,\pi \,rad/\sec $
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