Question

Two adjacent sides of a parallelogram are in the ratio 5: 7. If the perimeter of parallelogram is 72 cm, find the length of its side

Answer 1

Let the adjacent sides be 5x and 7x respectively. Then we know that the opposite sides of a parallelogram are equal and opposite.
So 5x+7x+5x+7x=24x
Now 24x=72
Or x= 72/24=3cm
So 5x= 5*3=15cm
And 7x=7*3=21cm
Hope u got that :-)

Answer 2

Hello!!

Here is the answer.

Given that adjacent sides are in ratio 5:7 and perimeter is 72 cm.

Let the common ratio be k.
So, sides will be 5k and 7k.

Now,
P = 2(sum of adjacent sides)
72 = 2 ( 7k + 5k)
72 = 2 (12k)
36 = 12k
k = 3.

So, sides are
5k = 5×3= 15 cm and 7k = 7×3 = 21 cm.

Hope You Got It