If the cost of 5 chairs and 4 tables is Rs. 915 and the cost of one table is Rs. 80, then what will be the cost of 5 dozen chairs and 2 dozen tables?
Cost of 5 chairs and 4 tables = Rs. 915 Cost of 1 table = Rs. 80 Cost of 4 tables = 80`xx` 4 = Rs. 320 Cost of 5 chairs = 915 – 320 = Rs. 595 Cost of one chair = `595/5` = Rs. 119 Cost of 5 dozen chairs = 5 `xx` 12 `xx` 119 = Rs. 7,140 Cost of 2 dozen tables = 2 `xx` 12`xx` 80 = Rs. 1,920 Total cost = 7,140 + 1,920 = Rs.9,060