A boat can travel with a speed of 15 km/hr in still water. If the speed of the stream is 4 km/hr. find the time taken by the boat to go 68 km downstream? Choices
A) 3 hours 30 minutes  B) 3 hours  C) 4 hours  D) 5 hours  E) None
Solution   Speed Downstream	= (15 + 4) km/hr   = 19 km/hr.   Time taken to travel 68 km downstream	=(68 / 19)hrs   = 3 hrs 30 mins.   3 hours 30 minutesnswer 3 hours 30 minutes
<result>A</result>
A boat can travel with a speed of 15 km/hr in still water. If the speed of the stream is 4 km/hr. find the time taken by the boat to go 68 km downstream?