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:
A) 30/18 B) 30/29 C) 30/12 D) 30/13 E) 30/12
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   = 30/12 hours.   Answer:30/12
<result>E</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?