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 120 km downstream?	Choose the correct choice from the following choices:
A) 60/18
B) 30/29
C) 60/12
D) 60/13
E) 30/82
Speed downstream = 20 + 6= 
<gadget id="calculator">20 + 6</gadget>
<output>26</output>
26 kmph.   Time required to cover 60 km downstream= d/s = 120/26   = 60/13 hours.   Answer:60/13
<result>D</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 120 km downstream?