The diameter of the driving wheel of a bus is 140 cm. How many revolutions per minute must the wheel make in order to keep a speed of 66 km per hour?
Created: 1 year ago |
Updated: 1 month ago
best des
peed of the bus = 66 km/hr
Distance covered by the wheel in one minute = 6066 × 1000 × 100 = 110000 cm
Circumference of the wheel = 2 × 22/7 × 70 = 440 cm
Therefore, distance covered by the wheel in one revolution = 440 cm
Hence, number of revolutions in one minute = 110000/440 = 250 times
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