Question

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

• A. 200
• B. 110
• C. 740
• D. 700

Answer 1

Answer:

D. 700

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