Find the perimeter of a rectangle if its length is 29 cm and its area is 290 cm2.

To solve the problem, you first need to determine the width of the rectangle.

Since in the condition of the problem we indicated its area and the length of one of the sides, in order to determine the width, it is necessary to divide the area, which is equal to 290 cm ^ 2, by the length equal to 29 cm.

In this case, we get:

290/29 = 10 cm.

In order to determine the perimeter of a rectangle, you need to find the doubled sum of its sides.

In this case, we get:

P = 2 * (10 + 29) = 2 * 39 = 78 cm.

Answer: The perimeter of the rectangle is 78 cm.