A man can row a boat at 20 kmph in still water. If the speed of the stream is 8 kmph, what is the time taken to row a distance of 60 km downstream?
Pick one:
A) 30/16 hours
B) 80/13 hours
C) 30/73 hours
D) 15/7 hours
E) 50/13 hours
Speed downstream = 20 + 8= 
<gadget id="calculator">20 + 8</gadget>
<output>28</output>
28 kmph.   Time required to cover 60 km downstream= d/s = 60/28   = 15/7 hours.   Answer:15/7 hours
<result>D</result>
A man can row a boat at 20 kmph in still water. If the speed of the stream is 8 kmph, what is the time taken to row a distance of 60 km downstream?