In one hour, a boat goes 11 km along the steram and 5 km against the stream. The speed of the boat in still waer (in km/hr) is:
Pick.
A) 2 B) 4 C) 8 D) 12 E) 15
Sol.   Speed in still water = 1/2 (11+5) kmph = 8 kmph.   Answer 8
<result>C</result>
In one hour, a boat goes 11 km along the steram and 5 km against the stream. The speed of the boat in still waer (in km/hr) is: