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1. The wheel of an engine of 300 cm in circumference makes 10 revolutions in 6 seconds. What is the speed of the wheel (in km/h)?
Distance covered in 10 revolutions = 300 * 10 = 3000 cm = 30 m
30 meters are covered in 6 seconds.
Speed of the wheel = = 5 m/s
5 m/s = = 18 km/h. [ To convert m/s to km/h, we use to multiply by factor ]
Solution:
Circumference = One revolutionDistance covered in 10 revolutions = 300 * 10 = 3000 cm = 30 m
30 meters are covered in 6 seconds.
Speed of the wheel = = 5 m/s
5 m/s = = 18 km/h. [ To convert m/s to km/h, we use to multiply by factor ]