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
3 : 1
3 : 2
4 : 3
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].
[B].
[C].
[D].
Answer: Option B
Explanation:
Let man’s rate upstream be x kmph.
Then, his rate downstream = 2x kmph.
| (Speed in still water) : (Speed of stream) = | 2x + x | : | 2x – x | ||||
| 2 | 2 |
| = | 3x | : | x |
| 2 | 2 |
= 3 : 1.