The radius of a circular wheel is 42 cm, then find the distance travelled by it in 200 revolutions in m.

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Solution

In one revolution, the wheel covers the distance of one circumference.
Circumference of the circle $= 2 π r = 2 \times \frac{22}{7} \times 42 = 264 c m = 2.64 m$
Distance travelled in $200$ revolutions $= 200 \times 2.64 = 528 m$

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