Question 884541
let length of both candles are 1. After t hours, length remaining of first candle would be 1-t/4 and length remaining of second candle would be 1-t/3. According to the problem:
2(1-t/3)=1-t/4
=>2-2t/3=1-t/4
=>1=5t/12
t=2.4 hours