1.

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

Answer»

Given that one of the sides is longer than the other by 10cm and let it be x and x+10

Also given that its perimeter is 140cm

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=30cm

x + 10 = 40cm

Therefore the sides are 30cm and 40cm.



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