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11 April, 06:40

Two coins have a radii of 3 cm and 1 cm the smaller coin rolls along the circumference of the fixed larger coin until the smaller coin returns to its original position. How many revolutions has the small coin made?

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  1. 11 April, 06:49
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    I think you have to do 3cm/1cm

    I think the small coin makes 3 revolution
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