Answer : Option C Explanation : SP of 150 metres of clothes = Rs.6600 SP of 1m cloth = Rs. $6600 \over 150$ = Rs.44 SP of 300 metres of cloth = Rs.12750SP of 1m cloth = Rs.$12750 \over 300$ = Rs.42.5 Concession = Rs. (44 - 42.5) = Rs.1.5