Question

Adjacent sides of a parallelogram differ by 5cm. If the perimeter is 90cm,find the length of the sides of the parallelogram.

Answer 1

let the sides be x, x+5, x+10 & x+15

90 = x + x+5 + x+10 + x+15
90 = 4x + 30
90-30 = 4x
60/4 = x
x = 15


so, the sides are 15cm, 20cm, 25cm & 30cm