Perimeter of a rectangle 80 mm length 3 times the width Calculate the length and width of this rectangle
| September 3, 2021 | education
The perimeter of a rectangle is the sum of all its sides. According to the condition of the assignment, this value for such a figure is 80 mm, and the length is 3 times the width. Therefore, the sum of two unequal measurements is 40 mm.
Let’s write the equation:
3x + x = 40.
On the left side of the equation, we perform actions with the coefficients of the variable:
4x = 40.
To find the second factor, you need to divide the product by the first.
x = 40: 4 = 10.
Therefore, the width is 10mm and the length = 10 * 3 = 30mm.
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