The length of the rectangle is 12.6 cm, and the width is three times less. Find the area of this rectangle.

A bit of theory: the area of a rectangle is equal to the product of its sides – width and length.

In our case, this is the product of two values: 12.6 and 12.6 / 3, since the width of the rectangle is 3 times less than its length.

If we take the area of the rectangle as X, then we can write the equation:

X – 12.6 * 12.6 / 3 = 0;

X = 12.6 * 4.2;

X = 52.92.

Answer: The area of the rectangle is 52.92 cm2.