Let the common multiple be x
So, according to the ratio, we will have parts as
3x
3x
5x
Here, they add up to 132
Writing equation.
132 = 3x + 3x + 5x
132 = 11x
x = 12
Now, putting the values !!
3x = 3 × 12 = 36 kg
3x = 3 × 12 = 36 kg
5x = 5 × 12 = 60 kg