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 most appropriate option: A) 30/83 hours B) 33/13 hours C) 31/13 hours D) 30/13 hours E) 36/14 hours
Speed downstream = 20 + 6= 
<gadget id="calculator">20 + 6</gadget>
<output>26</output>
26 kmph.   Time required to cover 72 km downstream= d/s = 72/26   = 36/13 hours.   Answer:36/14 hours
<result>E</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?