Math CentralQuandaries & Queries


Question from Himmler, a parent:

if a steel weighs 0.30 pounds per cubic inch, then the weight of a 2 inch square steel bar 90 inches long is------------pounds.

The bar measures 2 inches by 2 inches by 90 inches so its volume is 2× 2 × 90 = 360 cubic inches. Each cubic inch weighs 0.3 pounds so how much does that bar weigh?


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