Question

The perimeter of a parallelogram is 140 cm. if one of the side is longer than the other by 20 cm. then find the length of each side.

Answer 1

perimeter of parallelogram=140cm
let one side be X
then other side=X+20
2(l+b)=140. (for parallelogram too
2(X+X+20)=140
2(2x+20)=140
2x+20=140÷2
2x+20=70
2x=70-20
2x=50
X=50÷2
X=25cm
so,one side =25cm
other side=25+20=45cm
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Answer 2

perimeter=140cm
let the one side be 'X'
then, the other side will be 'X+20'

2(l+b) = 140. [ perimeter of prlogrm = 2(l+b)]
2(X + x+20) =140
2(2X +20) = 140
2X + 20 = 70
2X = 50
X = 25cm