SOLUTION: the length of a rectangular mailing label is 5 cm less than twice the width. The perimeter is 20 cm. find the dimensions of the label
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Question 336559: the length of a rectangular mailing label is 5 cm less than twice the width. The perimeter is 20 cm. find the dimensions of the label Answer by Jk22(389) (Show Source):
You can put this solution on YOUR website! let l=length, w=width, p=perimeter (in cm)
data : p=20, l=2w-5
know : p=2l+2w=2l+l+5=3l+5 (warning : not to read as 21+1=22)
=> 20=3l+5 => l=5, w=(l+5)/2=5
hence it were a square of 5cm side.
