The width of the rectangle is 40cm and the length is 2 times longer. find the perimeter of a rectangle and its area
| August 7, 2021 | education
Let’s find the length of the rectangle, provided that it is 2 times its width, equal to 40 cm:
2 * 40 = 80 cm.
The sum of all sides of such a figure (perimeter) is calculated by the formula:
P = 2a + 2b.
Let’s substitute the obtained values:
P = 2 * 80 + 2 * 40 = 160 + 80 = 240 cm.
The area corresponds to:
S = a * b = 80 * 40 = 3200 cm².
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