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2 August, 21:31

A round manhole cover has a diameter of 3ft. It weighs 9.2lb per square foot. To the nearest pound, how much does the manhole cover weigh?

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  1. 2 August, 23:46
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    (9.2*3.14 * (3^2)) / 4=64.998 which would round to about 65 pounds
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