A man can row a boat at 40 kmph in still water. If the speed of the stream is 6 kmph, what is the time taken to row a distance of 60 km downstream? Choose the correct choice from the following options:
A) 30/83 hours	B) 80/13 hours	C) 30/13 hours	D) 30/23 hours	E) 32/13 hours
Speed downstream = 40 + 6= 
<gadget id="calculator">40 + 6</gadget>
<output>46</output>
46 kmph.   Time required to cover 60 km downstream= d/s = 60/46   = 30/23 hours.   Answer:30/23 hours
<result>D</result>
A man can row a boat at 40 kmph in still water. If the speed of the stream is 6 kmph, what is the time taken to row a distance of 60 km downstream?