Find the area of a rectangle if its perimeter is 46 and one side is 5 larger than the other.
September 26, 2021 | education
| The perimeter of the rectangle is found by the formula:
P = 2 * (a + b), where a is its length, b is its width.
According to the conditions of the problem, one side is 5 more than the other, which means the length is 5 more than the width.
The length is expressed in terms of the width.
a = b + 5.
Now we substitute the values into the formula.
46 = 2 * (b + 5 + b).
Divide by 2.
23 = 2 * b + 5.
2 * b = 18.
b = 9, the width of the rectangle.
Let’s find the length of the rectangle.
a = 9 + 5 = 14.
The area of the rectangle is found by the formula:
S = a * b.
Find the area of the rectangle.
S = 14 * 9 = 126 cm2.
Answer: the area of the rectangle is 126 cm2.
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