C. The diameter of the driving wheel of a bus is 140cm. How many revolutions per
minute must the wheel make in order to keep a speed of 60km per hour?
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Answer:
mam this the answer.
Step-by-step explanation:
Speed of the bus = 66 km/hr
Distance covered by the wheel in one minute =
60
66×1000×100
=110000 cm
Circumference of the wheel = 2x22/7x70=440
Therefore, distance covered by the wheel in one revolution = 440 cm
Hence, number of revolutions in one minute =
440/110000=250
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