The length of the rectangle is 4/5 longer than its width, find the perimeter of the rectangle if the width is 859.

A rectangle is a rectangle with equal opposite sides and right angles.

The perimeter is the sum of all sides. For such a figure, it is determined by the formula P = 2a + 2b.

First of all, we find the length of the rectangle, provided that it is 4/5 more than the width, equal to 859 cm:

859 + 859: 5 * 4 = 859 + 687.2 = 1546.2 cm.

P = 2 * 859 + 2 * 1546.2 = 1718 + 3092.4 = 4810.4 cm.