Kristina made rectangular place mats for her dining room table, as shown below. The area of each place mat is 135 square inches. The width of each place mat is 9 inches. How many inches long are all the sides of the place mat?

Answer 1

We can start by using the formula for the area of a rectangle:

Area = length x width

We know that the width is 9 inches and the area is 135 square inches, so we can solve for the length:

135 = length x 9

length = 135/9

length = 15

So each place mat is 15 inches long.

To find the perimeter (the total length of all the sides), we can use the formula:

Perimeter = 2 x length + 2 x width

Plugging in the values we know, we get:

Perimeter = 2 x 15 + 2 x 9

Perimeter = 30 + 18

Perimeter = 48

So all the sides of the place mat add up to 48 inches.