Algebra Practice Quiz 8

Multiple Choice Questoins. Click on the correct answer.

Problem 16

16. The strength of a rectangular beam varies jointly as its width and the square of its depth. If the strength of a beam one inch wide and 12 inches deep is 400 pounds, find the strength of a beam two inches wide and three inches deep.
    200 lbs.
    75 lbs.
    400 lbs.
    50 lbs.
    none of these.

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