Two sides of a parallelogram are in the ratio 5 : 3. If its perimeter is 64 cm, find the lengths of its sides.
Let x be the common multiple.
According to question, sides will be 5x and 3x.
Perimeter =
64 = 2 (5x + 3x)
64 = 16x
x = 4
5x = 20 cm
3x = 12 cm
So, sides will be 20 cm and 12 cm.