The length of a rectangle is 12 cm.This is 1/3 of its perimeter .Find the perimeter
12 = 1/3 of 36
36 cm
To find the perimeter of a rectangle, we need to know both its length and width. In this case, we are given the length of the rectangle, which is 12 cm. We can find the width by using the information that the length is 1/3 of the perimeter.
Let's assume that the width of the rectangle is "w" cm.
We know that the perimeter, P, of a rectangle is given by the formula:
P = 2(length + width)
Given that the length is 12 cm, we can substitute this value into the formula:
P = 2(12 + w)
We are also told that the length is 1/3 of the perimeter. This can be expressed mathematically as:
12 = (1/3)P
To find the perimeter, we can solve the above equation for P.
12 = (1/3)P
Multiplying both sides of the equation by 3:
36 = P
Therefore, the perimeter of the rectangle is 36 cm.