In one hour, a boat goes 11 km/hr along the stream and 5 km/hr against the

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Question: In one hour, a boat goes 11 km/hr along the stream and 5 km/hr against the stream. The speed of the boat in still water (in km/hr) is:

Options are:

A.     3 km/hr
B.     5 km/hr
C.     8 km/hr
D.     9 km/hr

Correct answer is:

C.     8 km/hr