In one hour,a boat goes 13 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
B) 5
C) 11
D) 9
E) 10
Solution   Speed in still water =1/2(13+9)kmph.= 11 kmph. Answer 11
<result>C</result>
In one hour,a boat goes 13 km along the stream and 9 km against the stream.The speed of the boat in still water (in km/hr) is :