- A10 km/h
- B12 km/h
- C8 km/h
- D9.6 km/h
Step-by-Step Solution
Downstream = , upstream = ⇒ km/h.
Answer: A) 10 km/h
The current is one-fifth of a boat's speed in still water. A 36 km out-and-back trip (36 km each way) takes 7.5 hours. What is the boat's speed in still water?
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