There are two types of alloys mixture having copper, zinc and nickel i.e. in alloy 1, the respective ratio is 3 : 2 : 1 and in alloy 2, the respective ratio is 5 : 2 : 2. If 120 kg of alloy 1 and 180 kg of alloy 2 is mixed than find the quantity of zinc in the mixture.
1
40 kg
2
60 Kg
3
70 Kg
4
80 Kg
5
90 Kg