4 identical squares were cut out of a rectangle, one side of which is 18 cm. The area of the remaining figure

4 identical squares were cut out of a rectangle, one side of which is 18 cm. The area of the remaining figure is torn 90 cm, which is 10 times more than the area of each of the cut out squares. Find the pyrimeter of the rectangle.

1) First, let’s calculate the area of each square.

90: 10 = 9 cm square.

2) Now let’s determine the sum of the areas of all squares.

9 * 4 = 36 cm square.

3) Find the area of the entire rectangle.

36 + 90 = 126 cm square.

4) Calculate the second side of the rectangle if one is 18.

126: 18 = 7 cm

5) Find the perimeter of the rectangle.

P = 2 (7 + 18) = 2 * 25 = 30 cm

Answer: the perimeter of the rectangle is 30 cm.