The ratio of the length to the width of a rectangle is 3 : 2, and its perimeter is 50 m. What is its length?
Correct answer: A. 15 m
Length + width = 50 ÷ 2 = 25 m, split in the ratio 3 : 2, so one part = 25 ÷ 5 = 5 m. Length = 3 × 5 = 15 m and width = 10 m.
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