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Area of a Circle

A wheel makes...

Question

A wheel makes 360 revolutions in 1 minute. Through how many radians does it turn in 3 seconds?

A

6π

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B

36π

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C

10π

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D

12π

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Solution

The correct option is B
36π

In 1 minute the wheel turns 360 times, So in 3 seconds it turns 18 times. One revolution =360 degrees =2π radians. So 18 revolutions =36π radians. (As 360 degrees = 2 π radians.)

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