Answer:
1x : 1 6667y
Step-by-step explanation:
Let :
unit of Rs. 60 per kg = x
Unit of Rs. 72 per kg = y
60x + 72y = 64.5(x + y)
60x + 72y = 64.5x + 64.5y
60x - 64.5x = 64.5y - 72y
-4.5x = - 7.5y
Divide both sides by - 1.5
3x = 5y
x = 5/3y
It could be mixed in the ratio ;
1x : 1.6667y