Let speed of boat be x miles/hr Let speed of river be s miles/hr First Method: Hat comes down 1 mile in 10 minutes. Hat comes with flow of river only. So its speed is equal to speed of river. In 60 minutes, it will travel 6 miles. thus, s = 6 miles/hr
Second Method: Distance travelled upward by boat = 1 + (5/60)*(x-s) miles Distance travelled downward by boat = (5/60)*(x+s) miles Both are same, so 1 + (5/60)*(x-s) = (5/60)*(x+s) x gets cancelled, and we have s/6 = 1 s = 6 miles/hr Second method is just one possible method which nobody would like to follow. First one is easier and faster - win-win situation For a change the easier method is faster as well -- Tushar Bindal Computer Engineering Delhi College of Engineering Mob: +919818442705 E-Mail : [email protected] Website: www.jugadengg.com -- You received this message because you are subscribed to the Google Groups "Algorithm Geeks" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/algogeeks?hl=en.
