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

univerkov | January 9, 2021 | education

Given:
rectangle
width = 4 whole 1/5 cm width is 1/2 length
Find: perimeter
Decision:
If the width is 1/2 of the length, then the length of the rectangle is 2 times larger than the width of the rectangle.
Let us then find the length of the rectangle:
Length = 2 * 4 whole 1/5 cm = 2 * (4 * 5 + 1) / 5 cm = 2 * (20 + 1) / 5 cm = 2 * 21/5 cm = 42/5 cm = 8 whole 2 / 5 cm
perimeter = 2 * (length + width)
perimeter = 2 * (4 whole 1/5 + 8 whole 2/5) cm = 2 * (21/5 + 42/5) cm = 2 * (21 + 42) / 5 cm = 2 * 63/5 cm = 126/5 cm = 25 whole 1/5 cm
Answer: perimeter = 25 whole 1/5 cm

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