A boat takes 19 hours for travelling downstream from point A to point B and coming back to a point C midway between A and B. If the velocity of the stream is 4 km/h and the speed of the boat in still water is 14 km/h, what is the distance between A and B?
Choices:	A) 200 km	B) 180 km	C) 160 km	D) 220 km	E) None of these
Speed of boat for downstream = 14 + 4= 
<gadget id="calculator">14 + 4</gadget>
<output>18</output>
18 km/hr   Speed of boat for upstream= 14 – 4 = 10 km/hr   Distance = x   x / 18 + (x /2)/10 = 19   x = 180 km   Answer: 180 km
<result>B</result>
A boat takes 19 hours for travelling downstream from point A to point B and coming back to a point C midway between A and B. If the velocity of the stream is 4 km/h and the speed of the boat in still water is 14 km/h, what is the distance between A and B?