In 1 hour, a boat goes 5 km along the stream and 9 km against the stream. The speed of the boat in still water (in km/hr) is :
Choose the correct choice from the following answers
A) 3 km/hr. B) 2 km/hr. C) 7 km/hr. D) 8 km/hr. E) 5 km/hr.
Speed in still water = 1/2(9 + 5) km/hr   = 7 km/hr. ANSWER :7 km/hr.
<result>C</result>
In 1 hour, a boat goes 5 km along the stream and 9 km against the stream. The speed of the boat in still water (in km/hr) is :