Question

the perimeter if triangle 36 cm sides are in the ratio 3:4:5 finds its sides

Answer 1

perimeter= sum of all sides
let the sides be 3x, 4x, 5x
36= 3x+4x+5x
36= 12x
x = 36/12
x= 3
sides are
3x = 3*3 =9cm
4x= 4*3 = 12cm
5x = 5*3 = 15cm

Answer 2

We can find this by the method of sum of terms ratio
Some of turns ratio=3+4+5=12
For finding the first side we will use the first number=3/12×36
=9
Second side=4/12×36
=12
Third side=5/12×36
=15

We can also verify it:-
Sum of all sides =perimeter
9+12+15=36
36=36
Hence verified

Your answer friend hope it helps you