The length of a rectangle is 3 times the width. The perimeter is 96 cm. Define variables, write an equation, and find the length and width of the rectangle.

Question

Im taking a test and ive been struggling with these type of questions, so i need a little help witht his one please

Answer 1

Let w = the width

Let 3w = the length

P = 2l + 2w

96 = 2(3w) + 2w

96 = 6w + 2w

96 = 8w

12 cm = w

3w = 3(12) = 36 cm