The wheel of a motorcycle is of radius 35 cm. The number of revolutions per minute must the wheel make so as to keep a speed of 66 km/hr will be
A. 50
B. 100
C. 500
D. 1000
Answer:C
The wheel of a motorcycle is of radius 35 cm. The number of revolutions per minute must the wheel make so as to keep a speed of 66 km/hr will be
A. 50 B. 100 C. 500 D. 1000
Explanation: Circumference of the wheel = 2πr = 2 × (22/7) × 35 = 220 cm