- A3
- B1.8
- C2.25
- D4.5
Step-by-Step Solution
Upstream speed = 16 − 4 = 12 km/h, so time = 36 ÷ 12 = 3 hours. (1.8 h uses the downstream speed 20 km/h.)
Answer: A) 3
A motorboat moves at 16 km/h in still water. The river flows at 4 km/h. How many hours will the boat need to go 36 km upstream?
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