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the minute hand of a clock is 6 inches long. how far does the tip of the minute hand move in 15 minutes?

what is the circumference of a circle with radius of 6 in?
It is 12 pi

What fraction of a circle does the minute hand move in 15 minutes?
It is 90 degrees

So what do I do with those numbers

  • math -

    Yes. The circumference of the circle is 12 times pi.

    C = 12 * 3.14 = 37.68 inches

    15/60 = 1/4
    Remember that 15 minutes is one-quarter of an hour.

    In 15 minutes, the minute hand moves around 1/4 of the circumference.

    Circumference equals

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  • math -


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