A wheel makes 360 revolutions per minute.
Question:

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

Solution:

Number of revolutions taken by the wheel in 1 minute $=360$

Number of revolutions taken by the wheel in 1 second $=\frac{360}{60}=6$

We know,

1 revolution $=2 \pi$ radians

$\therefore$ Number of radians the wheel will turn in 1 second $=6 \times 2 \pi=12 \pi$

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