Question

3) 420 meters of fencing is needed to enclose a rectangular field. If one side is 90 meters more than the other, find the dimensions (length and width) of the field.

Answer 1

Length= 150
Width= 60

How to solve:
Set up the equation as
x+x+x+90+x+90=420
Add up the x’s and the 90’s to get
4x+180=420
Subtract 420-180=240
4x=240
Divide 4 from 240 to get
x=60
(That gives you the width)
To get the length you just have to do 60+90=150