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Scale Factor

Question 8 • MO-Mathematics

Sammy went on a class trip to the art museum and sketched a scale drawing of a famous mural. The original painting was 72 inches wide and 108 inches long. Sammy used a scale factor of 1/12 to make his drawing. What is the length of Sammy’s drawing?

Answer
A
6 inches
B
9 inches
C
18 inches
D
42 inches

Explanation

A scale factor of 1/12 means each dimension of the drawing is 1/12 of the original. The mural’s length is 108 inches, so 108 ÷ 12 = 9 inches. Sammy’s drawing is 9 inches long, which is choice B.

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