A man can row a boat at 20 kmph in still water. If the speed of the stream is 4 kmph, what is the time taken to row a distance of 60 km downstream?
Choose the correct choice from the following choices.
A) 30/18 hours B) 37/13 hours C) 80/13 hours D) 5/2 hours E) 30/43 hours
Speed downstream = 20 + 4= 
<gadget id="calculator">20 + 4</gadget>
<output>24</output>
24 kmph.   Time required to cover 60 km downstream= d/s = 60/24   = 5/2 hours.   Answer: 5/2 hours
<result>D</result>
A man can row a boat at 20 kmph in still water. If the speed of the stream is 4 kmph, what is the time taken to row a distance of 60 km downstream?