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13 September, 13:15

Circle P has a radius of 7 and Circle R has a diameter of 8. The circumference of Circle P is how much greater than the circumference of Circle R?

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  1. 13 September, 13:38
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    Circumference is equal to 2pr

    The difference between the two circumferences is:

    d=2pR-2pr

    d=2p (R-r)

    d=2p (7-4)

    d=6p units

    d≈18.85 units (to nearest hundredth of a unit)
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