A shopkeeper purchased 'N' kg of mangoes at 150 Rs/kg. He sold (2N/3 - 16) kg of mangoes at 20% profit and remaining at 160 Rs/kg. If the total profit by selling all the mangoes together is 12% then find the value of 'N'?
1
24 kg
2
36 kg
3
48 kg
4
60 kg
5
72 kg