Question

the length of a rectangle is six times its width. the the area of the rectangle is 384m^2 find its perimeter

Answer 1

112m

Explanation:

If you know the length of a rectangle is six times its width, define the width as x, and the length as 6x. The area of a rectangle is its length multiplied by its width, so your area should be 6x^2 = 384 m^2. Divide the six first, which gives you x^2= 64. The square root of 64 is 8, so x=8. Your width is 8, so your length should be 6*8=48. The perimeter is 48+48+8+8 = 112 meters.