Ravi purchased 20 kg of sugar at the rate of Rs. 20 per kg and 25 kg at the rate of Rs. 12 per kg. He mixed both types. At what price per kg should he sell the mixture to make a 20% profit on the whole transaction?
1
Rs. 17.68
2
Rs. 6.40
3
Rs. 16
4
Rs. 18.67