Question

the length of a rectangle is four times its width .the area of the rectangle is 100 square centimeters.find the dimensions of the rectangle.

Answer 1

A = l * w
l = 4w
A = 4w*w → 4w²

100 = 4w²
25 = w²
5 = w

100 = 5 * l
20 = l

Answer 2

thanks