- A5
- B10.7
- C6
- D4.5
Step-by-Step Solution
Downstream speed = 11 + 4 = 15 km/h, so time = 75 ÷ 15 = 5 hours. (About 10.7 hours would be the upstream time.)
Answer: A) 5
A motorboat can do 11 km/h in still water and the river current is 4 km/h. How many hours will it need to cover 75 km downstream?
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