Question

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:

• A. 2:1
• B. 3:1
• C. 3:2
• D. 4:3

Answer 1

Answer: (B)

3:1

Let man's rate upstream be x kmph.
Then, his rate downstream = 2x kmph
$\therefore$ (Speed in still water) : (Speed of stream) $=\left(\frac{2x+x}{2}\right):\left(\frac{2x-x}{2}\right)$
$=\frac{3x}{2}:\frac{x}{2}$
$=3:1$