Question

6. The ratio of two sides of a parallelogram is 3:4 and its perimeter is 70 cm
Find the lengths of the sides of the parallelogram.​

Answer 1

let two sides of parallelogram(ABCD) be 3x and 4x

perimeter of parallelogram= 2(sum of two sides)

70cm = 2(3x + 4x)

70÷2 = 7x

35÷7 = x

5 = x

so, 3x = 3×5 = 15

4x = 4×5 = 20

hence, AB = DC = 15cm

AD = BC = 20cm