the driving wheel of locomotive engine is 4.2m in a diameter makes 75 Revolution in a minute find the speed of train in km/h
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Answer:
Step-by-step explanation:
Diameter = 4.2 m
Revolution per minute = 75
Speed of Train in Km/hr
Radius = Diameter = 4.2/2 = 2.1 m
2
Circumference = 2 π r
= 2 π (2.1)
= 2 x 3.14 x 2.1 (We know that the value of π is 3.14)
= 13.2 m
One revolution of the wheel = 1 circumference of the wheel
∵ it is given that the wheel makes 75 Revolution in a minute
Distance covered in 1 minute = 75 x 13.2 = 990 m/minutes
So the Distance covered in 1 hour = 990x60 = 59400m /hr
Distance covered in 1 hour = 59.4 Km/hr
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