An ancient Chinese candle clock tells the amount of the time that had passed by the amount of was that has been melted off the candle. Each candle is did die into 12 sections marked 1 inch apart. It takes 4 hours for each candle to completely melt after which a new candle is lit. If two candles have completely melted and one called had melted 4in how many minutes have passed since the first candle was it