A man's speed with the current is 15 km/hr and the speed of the current is 2.5 km/hr. The man's speed against the current is:
8.5 km/hr
9 km/hr
10 km/hr
12.5 km/hr

• current=0.5*(a-b)
  2.5=0.5*(15-b)
  b=10kmph
• 12 years agoHelpfull: Yes(7) No(2)
• Man's rate in still water = (15 - 2.5) km/hr = 12.5 km/hr.
  
  Man's rate against the current = (12.5 - 2.5) km/hr = 10 km/hr.
• 10 years agoHelpfull: Yes(7) No(1)
• 12.5 km/hr
  A man's speed with the current is 15 km/hr and the speed of the current is 2.5 km/hr. The man's speed against the current = 15 - 2.5 = 12.5 km/hr
• 12 years agoHelpfull: Yes(2) No(9)