Question
Download Solution PDFThe speed of a boat in still water is 5
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFGiven:
The speed of a boat in still water is 5
It is found that the boat takes thrice as much time to row up than it does to row down the same distance in the river stream.
Concept used:
1. While rowing upstream, the upstream speed is the difference between the speed of the boat in still water and the speed of the flow.
2. While rowing downstream, the downstream speed is the addition of the speed of the boat in still water and the speed of the flow.
3. Distance = Speed × Time
Calculation:
Let the distance and the speed of the stream be D and R respectively.
According to the question,
⇒
⇒
⇒ 4R =
⇒ R = 8/3
Now, the speed of the stream in m/s = 8/3 × 5/18 =
∴ The speed of the river stream is
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