Question

two candles of the same height are lit at the same time one candle burns completely in 5 hours the other in 4 hours if they are allowed uninterruptedly after how long would one candle be 2.4 times as long as the other?so;ution

Steve
we may consider the height to start out at y=1. So, we want to know when

1-x/5 = 2.4 * (1-x/4)