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 kmph and the speed of the boat in still water is 14 kmph, what is the distance between A and B ?
Answers
A) 160 km B) 180 km C) 200 km D) 220 km E) None
Solution   Speed Downstream	= (14 + 4) km/hr   = 18 km/hr.   Speed upstream	=(14 - 4) km/hr   = 10 km/hr..   Let the distance b/w A and B   be xkm.Then	=(x/18+ x/2 / 10)   = 19   = 19x / 180 = 19   x= 180.   Answer 180 km
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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 kmph and the speed of the boat in still water is 14 kmph, what is the distance between A and B ?