Question

The sides of a triangle are in the ratio 1:3:5 and it's perimeter is 90 cm. Find the length of it's largest side​

Answer 1

Answer:

Since the sides are in the ratio 1:3:5, we can take the sides as 1x, 3x and 5x

Its perimeter is 90cm

Perimeter is the sum of all sides,

So

1x + 3x + 5x = 90

9x = 90

x = $\frac{90}{9}$

x = 10cm

The length of its largest side is 5x, its value is 5 x 10cm

So length of largest side is 50cm