Some 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) 6
(B) 7
(C) 8
(D) 9
(E) 5
Some stream of consciousness:
Speed in still water = 1 (11 + 5)/2 kmph = 8 kmph. The answer: (C).