Question 25
Two candles X and Y have the same height but different diameters. They take 3 hours and 4 hours, respectively, to burn out. At what time must both candles be lit so that their heights are in the ratio $1:2$ at 5:00 PM? Give a clock time, including AM/PM or using 24-hour notation.
Modelling assumption: each candle loses height at a constant rate while burning, and both are lit at the same time. The source does not explicitly state uniform burning.
Modelling assumption: each candle loses height at a constant rate while burning, and both are lit at the same time. The source does not explicitly state uniform burning.