Question

a bike is running at a speed of 90 km per hour. If a radius of wheel is 14 cm how many Revolution it make in 5min.​

Answer 1

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The distance covered on ground by the wheel in one revolution is the circumference of the wheel. The total distance covered by the wheel is directly proportional to number of revolutions made by its wheel. Hence, the distance covered by the wheel after 50 revolution will be 50 times it's circumference.

Distance covered = πd × 50 =2 (22/7)×14 cm × 50 = 4400 cm = 44 m