Question

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?

Answer 1

9,135 lb

Explanation:

24 inches = 2 ft

12 in = 1 ft

9 in = 0.75 ft

volume = 2 ft * 2 ft * 15.75 ft = 63 ft^3

63 ft^3 * 145 lb/ft^3 = 9,135 lb