A wheel is of diameter 70 cm . If it makes 500 revolution in 5 minutes, find its speed in km/h.
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Answer:
Speed = 13.2 km/h
Step-by-step explanation:
Diameter = 70 cm
Radius = 35 cm
1 Revolution = Circumference
Circumference = 2πR
Circumference = 2 * 22/7 * 35
Circumference = 220 cm
Distance = 500 * 220 = 110000 cm = 1100 m = 1100/1000 km
Time = 5 min = 5/60 hours
Speed = Distance/Time
Speed = (1100/1000)/(5/60)
Speed = 13.2 km/h
Hope this helps !
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