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25 May, 13:54

The cross section area of a hole is 725cm^2. Given that the area of a circle is A=3.14r^2, find the radius of the hole.

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  1. 25 May, 16:33
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    Area of a circle = πr², where r is radius of circle

    when area = 725 cm²,

    r² = 725/π

    r² = 725 : 3.14 =

    r = √230.89

    r = 15.2 cm is the radius of the hole
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