Question

10. The sides of a triangle are in the ratio 4:7:9. If the perimeter of the triangle is 400 cm, then
find the sides of the triangle
​

Answer 1

Step-by-step explanation:

lets the sides be 4x, 7x and 9x of the triangle whose perimeter is 400cm

4x+7x+9x=400

20x=400

x=20cm.

now sides are:

4x= 4× 20=80cm

7x=7×20=140cm

9x=9×20=180cm.

hope you understand dear!!

Answer 2

The sides of triangle are 80cm, 140cm, 180cm.

Given:

The sides of a triangle are in the ratio 4:7:9.

the perimeter of the triangle is 400 cm

To find:

Find the sides of the triangle

Solution:

Let the ratio be x,

Sides of triangle are 4x, 7x and 9x

Perimeter of a triangle = sum of the sides of a triangle

Perimeter = 4x + 7x + 9x

400 = 20x

x = 400/20

x = 20

Sides of triangle are

4x = 4*20 = 80

7x = 7*20 = 140

9x = 9 *20 = 180

Hence, the sides of triangle are 80cm, 140cm, 180cm.

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