How did Pries tly light the candle from outside ?

Ram and Shyam each has 1 candle of same length but different thickness . Ram 's candle take 3 hour to burn completely and that time of Shyam 's candle is 4 hours .They both light their candle at 11 pm then at what time length of Ram 's candle would be half of that of Shaym 's candle

Why did the candle extinguish ?

A man holding a lighted candle in front of a thick glass mirror and viewing it obliquely sees a number of images of the candle. What is the origin of these multiple images ?