Question
A car has a tyre of diameter 28 cm. ___ km is covered by the car if the tyre rotates 150 times. (Use π = 22/7)
Answer: Option A
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Circumference of a circle of radius r cm = 2πr cm
Thus, circumference of the tyre = 2πr = Distance covered in each rotation
i.e., Distance covered in 1 rotation = 2×π×14 = 88 cm
Distance covered in 150 rotation = 88 × 150 = 13200 cm = 0.132 km
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