Question

The sides of a triangle are in the ratio 3: 2:5 and its perimeter is 30 cm. The length of
longest side is

​

Answer 1

Answer:

15 cm

Step-by-step explanation:

$\frac{5}{10} \times 30 = 15 \: cm$

Answer 2

Answer:15 cm

Let the sides of triangle be x.

so

3x+2x+5x=30

10x= 30

x= 30/10

x=3

then

3x= 3×3=9 cm

2x=2×3=6 cm

5x=5×3=15 cm

So longest side is 15 cm