The length of the rectangle is 5.6 cm, the width is 7/8 of the length. Find the perimeter.

First, let’s find what the width of this geometric figure is equal to.

In the initial data for this task, it is reported that the length of this rectangular quadrangle is 5 6/10 cm, and its width is seven-eighths of its length, therefore, the width of this geometric figure is:

(7/8) * 5.6 = 7 * 5.6 / 8 = 7 * 0.7 = 4.9 cm.

Let’s find what the sum of the lengths of all four sides of a given rectangular quadrangle is equal to:

P = 5.6 + 4.9 + 5.6 + 4.9 = 10.5 + 10.5 = 21 cm.

Answer: the perimeter is 21 cm.