The wheel of the engine of a train m in circumference makes 7 revolutions in 3 seconds. Find the speed of the train in km per hour.

Question

KnowledgeBoat · Accepted Answer

Given, Circumference of wheel = m. Number of revolutions = 7 Time = 3 seconds We know that, Distance = circumference × revolutions = × 7 = 30 m. So the train moves 30 m in 3 seconds. Speed = = = 10 m/s. 1 m/s = 3.6 km/h 10 m/s = 10 × 3.6 km/h = 36 km/h Hence, speed of the train = 36 km per hour.

Mathematics

The wheel of the engine of a train m in circumference makes 7 revolutions in 3 seconds. Find the speed of the train in km per hour.

Mensuration

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