A cement bridge post is 24 inches square and 15 feet 9 inches in length. If the cement weighs 145 pounds per cubic foot, how much does one bridge post weigh? A. 9,280 pounds B. 9,222 pounds C. 9,135 pounds D. 8,700 pounds
Explanation: Density = Mass / Volume Here density of concrete = 145 pounds per cubic foot Volume = Area * Length of post A cement bridge post is 24 inches square = Length of post = 15 feet 9 inch = 15.75 feet Volume of post = 0.1667 * 15.75 = 2.63 Weight of concrete post = 145* 2.63 = 380.63 pounds.
No options are correct.
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