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7 September, 09:41

In a circle, a 270degrees sector has area 75pi inches squared. What is the radius of the circle?

The radius of the circle is___in.

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  1. 7 September, 11:35
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    A 270 degree of sector = 0.75 of its area

    area = π r²

    so,

    0.75 π r² = 75 π

    r² = (75 π) / (0.75 π) = 100

    r = + √100 = 10

    so

    The radius of the circle is 10 in
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