# The width of the rectangle is 4 whole 1/5 cm, which is 1/2 of its length. Find the perimeter of the rectangle.

December 29, 2020 | education

| 1. Find the length of the rectangle. From the condition of the problem it can be seen that the width of the rectangle is half its length, therefore:

4 1/5 x 2 = 21/5 x 2 = 42/5 = 8 2/5 (cm).

2. Knowing the length of the rectangle, we find its perimeter (P = (a + b) x 2

(4 1/5 + 8 2/5) x 2 = 12 3/5 x 2 = 63/5 x 2 = 126/5 = 25 1/5 (cm).

Answer: the perimeter is 25 1/5 cm.

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