<PRE><B>Question 503591</B>
The Perimeter of a parallelogram is 54. The ratio of the lengths of the sides is 2:7 What are the lengths of the sides?
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let x=length of longer side
let y=length of shorter side
..
2x+2y=54
y/x=2/7
y=2x/7
2x+2(2x/7)=54
2x+4x/7=54
14x+4x=7*54=378
18x=378
x=378/18=21
y=2*21/7=42/7=6
ans:
length of longer side=21
length of shorter side=6</PRE>