A man can row a boat at 30 kmph in still water. If the speed of the stream is 8 kmph, what is the time taken to row a distance of 70 km upstream?  Choose the correct choice.
A) 35/9 B) 35/10 C) 35/11 D) 35/12 E) 35/13
Speed upstream = 30-8= 
<gadget id="calculator">30-8</gadget>
<output>22</output>
22 kmph.   Time required to cover 60 km downstream= d/s = 70/22 = 35/11 hours. Answer:35/11
<result>C</result>
A man can row a boat at 30 kmph in still water. If the speed of the stream is 8 kmph, what is the time taken to row a distance of 70 km upstream?