Tony has 3 sons – Harry, Peter and Murphy. Harry and Peter can complete the work in 24 days and 36 days respectively. In how many days Murphy will complete the work, if Tony could alone complete the whole work in 36/11 days. Tony can do double the work in same time in which all the sons together can complete the work . In how many days Murphy alone can do the whole work?
Harry + Peter + Murphy = 11 3 + 2 + Murphy = 11 Murphy = 6 Murphy can complete the work = 72/6 = 12 days