Mathematics · Speed, Time and Distance
A motorboat whose speed is 15 km/h in still water goes 30 km downstream and comes back to the starting point in a total of 4 hours and 30 minutes. What is the speed of the stream?
- 14 km/h
- 25 km/h✓
- 36 km/h
- 410 km/h
Correct answer
5 km/h
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