A MILKMAN SELLS 120 LITRES OF MILK FOR RS. 3360 AND HE SELLS 240 L...

18. A milkman sells 120 litres of milk for Rs. 3360 and he sells 240 litres of milk for Rs. 6120. How much concession does the trader give per litre of milk, when he sells 240 litres of milk ? (A) Rs. 2 (B) Rs. 3·5 (C) Rs. 2·5 (D) Rs. 1·5 (E) None of these Ans : (C)