SOLUTION: The width of a rectangle is fixed at 21cm. WHat lenghts will make the perimeter greater that 72 cm. Thank you for your time.

Algebra ->  Customizable Word Problem Solvers  -> Finance -> SOLUTION: The width of a rectangle is fixed at 21cm. WHat lenghts will make the perimeter greater that 72 cm. Thank you for your time.       Log On

Ad: Over 600 Algebra Word Problems at edhelper.com


    

Question 134860: The width of a rectangle is fixed at 21cm. WHat lenghts will make the perimeter greater that 72 cm.
Thank you for your time.
Answer by vleith(2983) About Me  (Show Source):
You can put this solution on YOUR website!
w = 21
Perimeter of a rectangle = 2w + 2l
We want P > 72
+72+%3E+2w+%2B+2l
+72+%3E+2%2A21+%2B+2l
+30+%3E+2l+
+15+%3E+l+
any length > 15 cm will do it