SOLUTION: the length of a rectangle is 3 times the with . the perimeter is 96cm. Find the with and length.

Algebra ->  Rectangles -> SOLUTION: the length of a rectangle is 3 times the with . the perimeter is 96cm. Find the with and length.       Log On


   

Question 789813: the length of a rectangle is 3 times the with . the perimeter is 96cm. Find the with and length.







Answer by waynest(281) About Me  (Show Source):
You can put this solution on YOUR website!
l = 3w
P = 2l + 2w
96 = 2(3w) + 2w
96 = 6w + 2w
96 = 8w
96/8 = 8w/8
12 = w
check:
96 = 2(3(12)) + 2(12)
96 = 2(36) + 24
96 = 72 + 24
96 = 96