Speed of a boat in standing water is 9 kmph and the speed of the stream is 1.5 kmph. A man rows to a place at a distance of 105 km and comes back to the starting point. The total time taken by him is:
1) 16 hours
2) 18 hours
3) 20 hours
4) 24 hours

• speed of upstream=9-1.5=7.5kmph
  speed of down stream=9+1.5=10.5kmph
  total time=(105/7.5)+(105/10.5)=24hrs
• 9 years agoHelpfull: Yes(40) No(1)
• tomorrow in hyderabad at MLRIT college
• 9 years agoHelpfull: Yes(2) No(2)
• total time=24 hrs
• 8 years agoHelpfull: Yes(0) No(0)