A 20-ounce candle is expected to burn for 60 hours. A 12-ounce candle is expected to burn for 36 hours. Assuming the variables are directly related, how many hours would a 9-ounce candle be expected to burn?18273345

divide size of candle by number of hours
 to find the rate it burns:

20 ounce / 60  hours = 1/3 ounce per hour 

divide 9 ounces by 1/3 ounce per hour to find total time:

9 / 1/3 = 27 hours