Question

The sides of a triangle are in the ratio 1 : 3 : 5 and its perimeter is 90cm.
Find the length of all sides.

Answer 1

Answer:

let the sides be 1x , 3x , 5x

Perimeter = Sum of all sides

90 = 1x + 3x + 5x

90 = 9x

x = 90/9 = 10cm

1x = 10cm

3x = 3 × 10 = 30cm

5x = 5 × 10 = 50 cm

These are the sides.

Answer 2

Let 1:3:5 be 1x + 3x + 5x

1x + 3x + 5x = 90

9x = 90

x = 90/9

x = 10cm

1x = 1(10) = 10 cm

3x = 3(10) = 30 cm

5x = 5(10) = 50 cm