andresplaysmc andresplaysmc

21-11-2017
Mathematics

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Problem A rectangle has a width of 10 centimeters. The rectangle's length is 4 times its width. What is the perimeter of the rectangle?

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altavistard altavistard

21-11-2017

Let W = 10 cm and L = 4W = 40 cm

Then P = 2L + 2W = 2(4W) + 2(W) = 10W = 100 cm

Check: Does 2(10 cm) + 2(40 cm) = 100 cm? YES

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