Question
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A car has to travel 0.121 km to reach from A to B. If the radius of the tyre is 7 cm. How many times will the tire rotate while the car travels from A to B ? (Use π = 227)
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Answer: Option A
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Circumference of tyre = 2 πr = Distance travelled in each rotation = 2×227×7 = 44 cm.
Total distance covered = Number of rotations × Circumference of tyre
Number of rotations = 0.121 km44 cm=0.121×1000 m44×0.01 m = 275
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