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Mathematics 13 Online
OpenStudy (anonymous):

A steel post is 6 ft. long and 6" thick in diameter. If a cubic foot of steel weighs 490 lb., how much does the rod weigh (to the nearest pound)?

OpenStudy (anonymous):

pi*(6)*(0.5)^2/4 = 1.178 ft^3 (1.178 ft^3)*(490 lb/ft^3) = 577 lbs

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