a circular wheel of radius 28 CM makes 300 revolution per minute. find the speed of the wheel in kilometre per hour find the number of revolution ne
eded to cover a distance of 35. 2 kilometre
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Answer: distance travelled in 1 revolution = 2*pi*r = 2*22*28/7 = 176cm
Number of revolutions = 300 per min= 300*60 = 18000 per hour
Total distance travelled in 18000 revolutions = 18000*176/100000 km = 31.68km
So speed = 31.68 km per hour
Number of revolutions needed to cover 35.2km = 3520000cm/ 176 = 20000
Step-by-step explanation:
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