The area of the rectangle is 144 cm2. The length of one side is 60 mm. Calculate its perimeter.

It is known from the condition that the area of the rectangle is 144 cm2. It is also known that the length of one side is 60 mm. In order to calculate its perimeter, let’s first find the length of the second side.

Let’s first convert 60 mm to centimeters.

in 1 cm = 10 mm; 60 mm: 10 = 6 cm.

Let’s remember the formula for finding the area of a rectangle:

S = a * b;

b = S / a;

Substitute the values and calculate:

b = 144/6 = 24 cm length of the second side.

To find the perimeter, we will use the formula:

P = 2 (a + b) = 2 (6 + 24) = 2 * 30 = 60 cm.