Use some thinking to answer the following 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:
(A) 3 km/hr
(B) 2 km/hr
(C) 4 km/hr
(D) 6 km/hr
(E) 8 km/hr
Speed in still water = 1/2 (11 + 5) kmph = 8 kmph. So the final answer is (E).