The length of the sides of the rectangle is 48 dm and 20 dm. Calculate the perimeter and area of this rectangle.

For this geometric figure, we will use the well-known formulas: S = a * b, P = 2 * a + 2 * b, where a
and b are the sides of the figure. From the conditions, one side a = 48 dm, the other b = 20 dm. We will substitute known values in the formulas and calculate:

Perimeter P = 2 * 48 + 2 * 20 = 136 dm

Area S = 48 * 20 = 960 dm²

Answer: the perimeter is 136 dm², and the area of the rectangle is 960 dm².