- A3
- B9
- C6
- D4.5
Step-by-Step Solution
Upstream = 42/7 = 6 km/h, downstream = 42/3.5 = 12 km/h. Stream = (12 − 6)/2 = 3 km/h.
Answer: A) 3
A fishing boat on the Hooghly covers 42 km upstream in 7 hours and the same 42 km downstream in 3.5 hours. What is the speed of the stream? (answer in km/h)
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