The diameter of a wheel of a car is 70 cm. How many revolutions will it make to travel 99 km
The diameter of a wheel of a car is 70 cm. How many revolutions will it make to travel 99 km
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Verified answer
Given Data of Wheel -
Diameter = 70 cm
Radius = Diameter / 2 = (70 / 2) cm
= 35 cm
∴ Circumference of wheel
= 2Πr
= [ 2 × 22 / 7 × 35 ] cm
= [ 2 × 22 × 5 ] cm
= 220 cm
Distance travelled by the wheel
= 99 km
= (99 × 100,000) cm
= 9,900,000 cm
∴ Number of Revolutions
=Distance Travelled/Circumference of Circle
= 9,900,000 cm / 220 cm
= 9,900,000 / 220
= 45,000
Hence, the wheel will take 45,000 complete revolutions to travel 99km.
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