Question

The side of a triangle are in the ratio 1:3:5 and its perimeter is 90 cm. The length of its largest side is what?

Answer 1

Answer:

50

Step-by-step explanation:

perimeter =a+b+c

90=3x+5x+x

x=10

(3*10)+(5*10)+(10)

30+50+10

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Answer 2

Answer:

50 cm

Step-by-step explanation:

Let the length of first side be 1 x cm

     the length of second side be 3 x cm

     the length of third side be 5 x cm

Perimeter of triangle = 90 cm     (given)

Sum of all sides = 90 cm             (Perimeter of triangle = sum of all sides)

1 x + 3 x + 5 x = 90 cm

9 x = 90 cm

∴x = 10 cm

⇒ Length of first side = 1 x cm = (1 × 10) cm = 10 cm

⇒ Length of second side = 3 x cm = (3 × 10) cm = 30 cm

⇒ Length of third side = 5 x cm = (5 × 10) cm = 50 cm

Hence, the length of largest side = 50 cm