The width of the rectangle is 5cm, and its perimeter is 2dm 8cm. Find the area of the rectangle

First, we need to convert 2 dm 8 cm to centimeters. Do not forget that 1 dm 10 cm.

2 dm 8 cm = 28 dm.

Now you can start solving the problem.

The rectangle has two equal widths, one is known and this is enough, we need to find one length. To do this, subtract two widths from the perimeter:

28cm – (5 + 5) = 18cm.

Further:

18/2 = 9 cm – length.

Further, using the formula S = a * b, we find the area of the rectangle.
S = 5 * 9 = 45 cm2

Answer: 45 cm2