train is running between two stations with a uniform speed. if the diameter of each wheel of a train is 42 cm and each wheel makes 1 200 Revolution per minute find the speed of the train
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Answer:
Speed = 26.4 m/s = 95 km/hr
Step-by-step explanation:
Diameter = 42 cm
Radius = 42/2 = 21 cm
Circumference = 2πr = 2× 22 × 21/7
= 132 cm
In 1 revolution, wheel covers 132 cm
It makes 1200 revolutions in 1 min
ie, so it covers 1200×132 = 158400 cm
= 1584 m
Speed = distance/time = 1584m/60sec
= 26.4 m/s
= 95 km/hr
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