The length of the rectangle is related to its width as 5 to 2. The length of the rectangle is 15cm.

The length of the rectangle is related to its width as 5 to 2. The length of the rectangle is 15cm. Find the perimeter of the rectangle.

Given:
The length a of a rectangle is related to its width b as 5: 2.
The length a of this figure is 15 centimeters.

The length a has five parts, and the width b has two.
Let’s find how many centimeters are in one part:
15: 5 = 3 centimeters.
Let’s calculate the width b:
b = 3 * 2 = 6 centimeters.
Find the perimeter of the rectangle by the formula P = a + a + b + b:
P = a + a + b + b = 15 + 15 + 6 + 6 = 42 centimeters.
Answer: The perimeter is 42 centimeters.