# The sum of the length and width of the rectangle is 21 cm. find the length and width

October 9, 2021 | education

| **The sum of the length and width of the rectangle is 21 cm. find the length and width of a rectangle if its length is 6 times its width**

Let the width of the rectangle be x cm, then its length will be 6x cm. Knowing the sum of the length and width of the rectangle, we can draw up an equation and solve it:

x + 6x = 21;

7x = 21;

x = 21/7;

x = 3.

If x = 3, then the rectangle is 3 cm wide and 18 cm long.

Answer: 3 cm, 18 cm.

Examination:

3 + 18 = 21;

21 = 21.

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