A strip with sides of 3 centimeters and 1 centimeters was cut from a rectangle with sides

A strip with sides of 3 centimeters and 1 centimeters was cut from a rectangle with sides of 5 centimeters and 3 centimeters long. Find the area of the remainder.

The area of a rectangle is equal to the product of its length and width:

S = a * b, where S is the area of the rectangle, a is its length, b is its width.

1) Calculate the area of the original rectangle (S1), for which a1 = 5 cm, b1 = 3 cm:

S1 = 5 * 3 = 15 cm ^ 2.

2) Find the area of the strip (S2) that was cut if a2 = 3 cm, b2 = 1 cm:

S2 = 3 * 1 = 3 cm ^ 2.

3) Find out the area of the remaining part of the rectangle (S3):

S3 = S1 – S2 = 15 – 3 = 12 cm ^ 2.

Answer: The area of the remaining part of the rectangle is 12 cm ^ 2.