A boat moves down stream at the rate of 1 km in 6 minutes and
upstream at the rate of 1 km in 10 minutes. The speed of current is

• 2 kmph
  
  If speed(in kmph) of the boat=b and current=c, then
  In downstream time taken(in hrs.)=1/(b+c)=6/60=1/10 or b+c=10 ---(i) &
  In upstream time taken(in hrs.)=1/(b-c)=10/60=1/6 or b-c=6 ---(ii)
  From (i) & (ii), b=8, c=2
• 8 years agoHelpfull: Yes(1) No(0)