In 1 hour, a boat goes 8 km along the stream and 12 km against the stream. The speed of the boat in still water (in km/hr) is :	Pick.
A) 3 km/hr. B) 2 km/hr. C) 10 km/hr. D) 8 km/hr. E) 5 km/hr.
Speed in still water = 1/2(8 + 12) km/hr   = 10 km/hr. ANSWER :10 km/hr.
<result>C</result>
In 1 hour, a boat goes 8 km along the stream and 12 km against the stream. The speed of the boat in still water (in km/hr) is :