A man can row at 6 km/h in still water and at 4 km/h upstream. How long will the man take to go to a place
1 km downstream and return?
a) 36 min b) 24 min c) 12 min d) 18min

• speed for downstream = 6+4=10 kmph
  Time taken to go 1 km downstream = 1/10 hrs =6 mins
  
  speed for upstream = 6-4=2 kmph
  Time taken to go 1 km upstream = 1/2 hrs =30 mins
  
  so total time = 6+30= 36 mins
• 13 years agoHelpfull: Yes(5) No(18)
• Here, upstream is already given 4k,/h, then how can you find again?
• 10 years agoHelpfull: Yes(3) No(2)
• hello friends, acc. to sol.n given by dipin sir, 4km/h must be the speed of water and 6km/h is the speed of boat.
• 9 years agoHelpfull: Yes(2) No(1)
• Thanku sir..... but down stream is already given as 4km/hr.... why ur are find out again
• 10 years agoHelpfull: Yes(1) No(2)