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27 December, 22:44

The perimeter of a semicircle is 15.42 kilometers. What is the semicircle's radius?

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  1. 27 December, 23:14
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    r = 4.9 km

    Step-by-step explanation:

    Perimeter of circle = πr

    Where P=15.42 km, π = 3.14

    15.42 = (3.14) (r)

    r = 15.42 / 3.14

    r = 4.9 km
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