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The diameter of a wheel of a motor vehicle is 63 cm.find the number of complete rotations does during a journey of 2 km.

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Lentgh of one rotation = Circumference of a circle = d * pi

63 cm = 0.63 m

Circumference = 0.63 * 3.14159 = 1.9792017 m

2 km = 2,000 m

2,000 / 1.9792017 = 1,010.50843

1,011 complete rotations

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