the diameter of a driving wheel of a bus Is 105. if it makes 300 revolutions per minute,the speed of bus in km/h is
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Step-by-step explanation:
to find the distance covered by wheel in one revolution we require the circumference of the wheel. πd
circumference = π × d
= 22/7 × 105
= 22 × 15
= 330 cm
number of revolutions made in 1 minute = 300
distance covered in 1 minute = circumference × number of revolutions
= 330 × 300
= 99000 cm
distance covered in 1 hr
= 99000 × 60
= 5940000 cm
= 59400 m
= 59.4 km
therefore the speed of bus is 59.4 km/hr
hope you get your answer
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