Question

If the perimeter of PQR is 40 cm and the ratio of its sides are 1:3:4. Find the sides of the triangle. ​

Answer 1

Answer:

5, 15 and 20

Step-by-step explanation:

Let the sides be x, 3x and 4x

Perimeter is 40

=> x + 3x + 4x = 40

=> 8x = 40

=> x = 5

So the sides are 5, 15 and 20

Answer 2

Answer:

First side of ratio 1 = 5cm

second side of ratio 3 = 15cm

third side of ratio 4= 20cm

Step-by-step explanation:

Perimeter of triangle PQR= a+b+c

ratio of its sides =1:3:4

Let's take it as= 1x, 3x, 4x

1x+3x+4x=40cm

8x=40

x=40/8

x=5cm

1x=1×5=5cm

3x=3×5=15cm

4x=4×5=20cm