speed of river=(distance traveled by object in it) / total time it took to travel
here hat has traveled a distance of 1 KM and it has taken =5mn+5 min=10 min=10min/60=1/6 hrs; so speed = 1/(1/6)=6km/hr On Jul 6, 9:28 pm, Tushar Bindal <tushicom...@gmail.com> wrote: > 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 : tushicom...@gmail.com > 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 algogeeks@googlegroups.com. To unsubscribe from this group, send email to algogeeks+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/algogeeks?hl=en.
