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 60 km downstream?	Choose the correct choice from the following.
A) 3:7  B) 3:6  C) 3:1  D) 3:2  E) 3:5
The ratio of the times taken is 2:1.   The ratio of the speed of the boat in still water to the speed of the stream = (2+1)/(2-1)= 
<gadget id="calculator">(2+1)/(2-1)</gadget>
<output>3</output>
3/1= 
<gadget id="calculator">3/1</gadget>
<output>3</output>
3:1   Speed of the stream= 42/3= 
<gadget id="calculator">42/3</gadget>
<output>14</output>
14 kmph.Answer:3:1
<result>C</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 60 km downstream?