The width of the rectangle is 15cm, and its perimeter is 66cm. Find his area.

The area of a rectangle can be found using the following formula:

P = 2 * (a + b).

Now you need to plug in the perimeter and width values into this formula to find the length of the rectangle.
P = 66 cm.
b = 15 cm.
Substitute these values.

66 = 2 * (a + 15).

Divide by 2.

33 = a + 15.

a = 33 – 15.

a = 18 cm.
Now the sides of this rectangle are known, you can find the area.

The area of a rectangle can be found like this:

S = a * b.

Determine the area of this rectangle.

S = 18 * 15 = 270 cm2.

Answer: the area of the rectangle is 270 cm2.