Question

The length of a rectangle is four times its width. if the perimeter of the rectangle is 90 cm, find its length and width

Answer 1

length 36, width, 9.

Explanation:

you are trying to find "X" and it's 4 times the size of y, the whole thing is equal to 90. it would look like this

y=4x

y(4x) + x = 90

5x=90

90/5= 18

the rest is the "y" value, 72.

divide both by 2 because rectangles have 4 sides, and you get the answer above.