search
Q: A motor boat, whose speed in still water is 20 km/h, takes 3 hours to cover a distance of 22.5 km upstream and then return to its starting point. What is the speed of the stream (in km/h)?
  • A. 11
  • B. 8
  • C. 10
  • D. 9
Correct Answer: Option C -
answer image

Explanations:

explanation image