The sides of a triangle are in the ratio 3: 4: 5. what is the length of each side if the perimeter of the triangle is 90 cm?

For 3:4:5      3          4         5
                  22.5     30     37.5

If you multiply 3,4,and 5 by 7.5, you get 22.5, 30, and 37.5.

22.5+30+37.5=90

If you make it a little more clear i can answer it

The answer is : 63explanation 60 times 0.05360+363