Subjective Type

The perimeter of a parallelogram is 140 cm. If one of the sides is longer than the other by 10 cm,find the length of each of its sides.

Solution

Given that one of the sides is longer than the other by $$10\ cm$$ and let it be $$x$$ and $$x+10$$
Also given that its perimeter is $$140\ cm$$
But we know that perimeter $$=2(length + width)=2(x+(x+10))$$
$$140=2(2x+10)$$
$$140=4x+20$$
$$140 -20=4x$$
$$x=120/4=30$$
$$x=30\ cm$$
$$x+10=40\ cm$$
Therefore the side are $$30\ cm$$ and $$40\ cm$$.

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