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:
Choose the correct choice from the following options.
A) 3 B) 4 C) 5 D) 8 E) 9
Speed in still water = (11 + 5)/2= 
<gadget id="calculator">(11 + 5)/2</gadget>
<output>8</output>
8 kmph.   answer :8
<result>D</result>
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: