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7 November, 10:06

A hospital needs a circular landing pad for their helicopter. The landing pad should be 5000 square feet. The contractor calculated that the pad would need to be about 40 feet across

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  1. 7 November, 11:39
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    area = pi x r^2

    5000 = 3.14 x r^2

    r^2=5000/3.14 = 1592.356

    r = sqrt (1592.356) = 39.9 round to 40

    diameter = 40*2 = 80

    the pad needs to be 80 feet across
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