A man wishes to cross a river perpendicularly. In still water, he takes 4 minutes to cross the river,but in flowing river he takes 5 minutes. If the river is 100 m wide, the velocity of the flowing water of the river is

• speed in still water , s= 100/4 = 25 mtr/min
  if w is speed of flowing water, then
  speed in flowing water = s-w = 100/5 = 20 mtr/min
  
  speed of flowing water = 25-20= 5 mtr/min
• 11 years agoHelpfull: Yes(15) No(7)
• 100/4=25
  100^2+5s^2 = (5*25)^2
  25s^2= 5652
  s^2= 225
  s=15
• 7 years agoHelpfull: Yes(2) No(0)