20isela00p36j52 20isela00p36j52
  • 22-10-2018
  • Mathematics
contestada

The length of a rectangle is five times its width. If the area of the rectangle is 84m, find its perimeter.

Respuesta :

meghanbf
meghanbf meghanbf
  • 22-10-2018

The width of the rectangle can be represented as x, and the length can be 5x.  Therefore, the area of the rectangle is x(5x)=84.

Solve for x:

6x=84

*Divide both sides by 6*

x=14


So, the width of the rectangle is 14.  To find the length, multiply 14 by 5.  The length is 70.


To find the perimeter, add up the length of each side:

14+14+70+70=168


The perimeter of the rectangle is 168.

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