Question

if the perimeter of a parallelogram is 21 cm and the adjacent sides are in ratio 3:4 ,find the sides of the parallelogram.

Answer 1

Let the length be 3x
let the breadth be 4x

perimeter=2(l+b)
21 =2(3x+4x)
21/2 =7x
x=3/2
x=1.5

l=3×1.5
l=4.5cm

b=4×1.5cm
b=6 cm

Answer 2

Answer:

let the length be ×

let the breath be 4 ×

perimeter = 2 (l+b)

21=(3×+4×)

21/2=7× ×=3/2

×=3 ×1.5

l=3×1.5

l=4.5cm

b= 4×1.5cm

b=6cm