Question
During Christmas, Jack's candle and Mark's candle were placed on an altar. Jack's candle was 4 longer than Mark's candle. Jack's candle and Mark's candle were lit at 6:00pm and 8:30pm respectively. They burnt down to the same height at 10:30pm. At 1:30am, Mark's candle was burnt out while Jack's candle was burnt out at 3:00am. Find the original heights of (a) Mark's candle and (b) Jack's candle.
4 m
(a)

Click button first when a symbol is required. X

(b)

Click button first when a symbol is required. X