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9 March, 23:58

A bicycle tire completes 9/10 of a revolution every 1/3 second. How many revolutions will the tire complete every minute?

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  1. 10 March, 03:39
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    Find out how many revolutions it makes in 1 second.

    9/10 * 3 = 27/10 = 2.7

    Set up a proportion.

    There are 60 seconds in a minute.

    2.7/1 = x/60

    Cross multiply:

    x = 2.7 * 60

    x = 162

    So it will make 162 revolutions a minute.
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