The length of a rectangle is 5/16 of its perimeter. Find the width of this rectangle if it is 80cm long.

1. To solve the problem, you need to know the perimeter of the rectangle. The length of the rectangle and what part of the perimeter is known from the problem statement.

80/5/16 = 80 * 16/5 = 16 * 16/1 = 256 centimeters.

2. Let’s say the width is x centimeters. Let’s make an equation and find its value.

(x + 80) * 2 = 256;

2x + 160 = 256;

x = (256 – 160) / 2 = 48 centimeters.

Answer: 48 centimeters.