A man can row a boat at 20 kmph in still water. If the speed of the stream is 6 kmph, what is the time taken to row a distance of 72 km downstream? Choose the correct answer:  A) 30/16 hours  B) 36/13 hours  C) 30/73 hours  D) 30/13 hours  E) 50/13 hours
Speed downstream = 20 + 6= 
<gadget id="calculator">20 + 6</gadget>
<output>26</output>
26 kmph.   Time required to cover 60 km downstream= d/s = 72/26   = 36/13 hours.   Answer:36/13 hours
<result>B</result>
A man can row a boat at 20 kmph in still water. If the speed of the stream is 6 kmph, what is the time taken to row a distance of 72 km downstream?