Mathematics · Speed, Time and Distance
A motor boat, whose speed is 9 km/h in still water, goes 12 km downstream and comes back to the starting point in a total time of 3 hours. Find the speed of the stream.
- 18 km/h
- 210 km/h
- 33 km/h✓
- 45 km/h
Correct answer
3 km/h
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