Question

the perimeter of a triangle is 600m.If the ratio of its sides is 12:13:15 then find the longest side.

Answer 1

yes you can do it see
the perimeter of a triangle is the sum of its all sides
so it will be
12x + 13x + 15x=600
40x=600
x=15
and put values of x
first side=12×15=180
second side=13×15=195
longest side=15×15=225

Answer 2

Let the sides be 12x, 13x and 15x.
Now, 12x+13x+15x=600
=>40x= 600
=>x=15
Therefore, 12x=180m,
13x=195m
and 15x=225m.
Therefore, the longest side is 225m.