SOLUTION: A classroom has a length that is 6 metres shorter than its width. If the perimeter is 30m, what is the length and width? (Ice-em 9 book) Thank you !

Algebra ->  Coordinate Systems and Linear Equations  -> Linear Equations and Systems Word Problems -> SOLUTION: A classroom has a length that is 6 metres shorter than its width. If the perimeter is 30m, what is the length and width? (Ice-em 9 book) Thank you !       Log On


   

Question 972439: A classroom has a length that is 6 metres shorter than its width. If the perimeter is 30m, what is the length and width?
(Ice-em 9 book)
Thank you !
Answer by satyareddy22(84) About Me  (Show Source):
You can put this solution on YOUR website!
Let l be the length,w be the width.
w - l = 6 (given)-------------(1)
perimeter = 30
=> 2(l+w) = 30 => l + w = 30/2 =15------(2)
Solving (1) & (2)
w-l=6
w+l=15
=> 2w =21 =>w=21/2=10.5m
l= 4.5m