The length of the rectangle is 15cm. What is the width if the perimeter is 40cm.
| February 17, 2021 | education
The perimeter of a rectangle is found using the following formula:
P = 2 * (a + b).
Substitute the known values into this formula and find the width of the rectangle.
40 = 2 * (15 + b).
40 = 30 + 2 * b.
2 * b = 40 – 30.
2 * b = 10.
b = 5 cm, the width of the rectangle.
Answer: the width of the rectangle is 5 cm.
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