Aptitude - Boats and Streams - Discussion

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Q.

If a boat goes 7 km upstream in 42 minutes and the speed of the stream is 3 kmph, then the speed of the boat in still water is :  .                          
A. 4.2 km/hr B. 13 km/hr
C. 9 km/hr D. 21 km/hr

Answer: Option B
Explaination:

 


Discussion

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