Radius of a circular wheel is 21 cm. Find the number of revolutions done by wheel to cover the distance of 924 m.

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Radius of a circular wheel is 21 cm. Find the number of revolutions done by wheel to cover the distance of 924 m.

A200

B110

C740

D700

Answer:

D. 700

Read Explanation:

Let number of revolutions done by wheel = n Here, r = 21cm, Distance = 924 m = 924 x 100cm According to the question, 2 π rn = 924 x 100 2 x 22/7 x 21 x n = 924 x 100 n = 700

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