Speed downstream = 90 + 20 = 110 kmph
Speed upstream = 90 - 20 = 70 kmph
The speed of a boat in still water is 90kmph and the speed of the current is 20kmph. Find the speed downstream and upstream?
  * 40, 68 kmph
  * 110, 70 kmph
  * 90, 60 kmph
  * 40, 60 kmph
  * 20, 60 kmph