Question

The length of a rectangle is three times the width. The perimeter of the rectangle is 72 cm. Find the dimensions of the rectangle.

Answer 1

Length: 27cm

Width: 9cm

Explanation:

Since the length of the rectangle is 3 times the width, we can assume the width=x and the length=3x.

P=72cm

Perimeter= 3x+3x+x+x

Set the 2 equations equal to each other

72=3x+3x+x+x

Solve for x

72=8x

9=x

Length=3x

Length=9(3)

Length=27

Width=x

Width=9

Answer 2

Answer: length=27, width 9

Step-by-step explanation: To solve this problem, you should set up an equation. The length is 3x, and the width is x. To find the perimeter of a triangle, you do length times two + width times two. So 6x+2x=72. 8x=72, x=9. Length is 27, width is 9.