Question

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.

Answer 1

Let x be the common multiple. 

According to question, sides will be x and (x + 10).

Perimeter = \(2(l+w)\)

140 = 2 (x + (x + 10)) 

140 = 2 (2x + 10) 

140 = 4x + 20 

4x = 120 

x = 30 cm 

x + 10 = 40 cm 

So, sides will be 30 cm and 40 cm.