Question

A rectangle has a width represented by x and length represented by 4x. it the area of the rectangle is 80, find the value of x

Answer 1

Area = length * width = 4x * x = 4x^2.

4x^2 = 80
x^2 = 80/4 = 20

x = sqrt 20

Answer is 4.47 to nearest hundredth.