- A7.5 hours
- B3.2 hours
- C4.5 hours
- D6 hours
Step-by-Step Solution
⇒ . Upstream = 6 km/h. Time = 45 ÷ 6 = 7.5 hours.
Answer: A) 7.5 hours
A boat's downstream and upstream speeds are in the ratio 7 : 3, and the current flows at 4 km/h. How long will 45 km upstream take?
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