A man takes twice as long to row a distance against the stream as to row the same distance in favour of the stream. The ratio of the speed of the boat (in still water) and the stream is:
Select:
A) 3 : 1
B) 1 : 3
C) 1 : 2
D) 2 : 1
E) None of these
Explanation :   Let speed upstream = x   Then, speed downstream = 2x   Speed in still water = (2x + x)/2 = 3x/2   Speed of the stream = (2x − x)/2 = x/2   Speed in still water : Speed of the stream = (3x/2) (2x/2) = 3 : 1. 3 : 1nswer : Option 3 : 1
<result>A</result>
A man takes twice as long to row a distance against the stream as to row the same distance in favour of the stream. The ratio of the speed of the boat (in still water) and the stream is: