A flywheel rotates about a fixed axis and slows down from 200 rpm to 100 rpm in one minute. How many revolution does the wheel complete in one minute?
A. 50
B. 100
C. 150
D. 200

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1 Answers

Correct Answer - C
`N=((n_(1)+n_(2))/(2))t`
`=((200+100))/(2)xx1=(300)/(2)=150`.

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