1.

Speed of a boat in still water is 9 km/hr. It goes 12 km down stream and comes back to the starting point in three hours.What is the speed of water in the stream?

A. 3.5 km/hr
B. 3 km/hr
C. 5 km/hr
D. 5.5 km/hr
Answer» C. 5 km/hr


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