Question

A rectangle has a perimeter of 72 feet.

The length and width are scaled by a factor of 3.5.

What is the perimeter of the resulting rectangle?

Answer 1

here is the answer
$72 \div 2 = 36$
the sum of the width and length of the rectangle is 36
so this is the equation

x+(x*3.5) =36
x+3.5x=36
4.5x=36
x =36 / 4.5=8

the width is 8

and the length is:

36- 8 = 28


so the area is

28 *8=224

the answer is 224ft