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22 November, 03:21

The tyre of a car wheel has an outer diameter of 30cm. how many times will the wheel rotate on a journey of 5km

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  1. 22 November, 04:05
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    Circumference = 2*pi*r = 2 (30) * pi = 188.5 cm

    so, one turn = 188.5 cm (m/100 cm) (km / 1000 m) = 0.001885 km

    5km / 0.001885 km = 2652.52 revolutions ... <===Answer
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