- A40 km/h
- B34 km/h
- C68 km/h
- D46 km/h
Step-by-Step Solution
Boat = 34 km/h and stream = 6 km/h; their sum is 40 km/h — which is simply the downstream speed.
Answer: A) 40 km/h
A boat's downstream speed is 40 km/h and its upstream speed is 28 km/h. What is the sum of its still-water speed and the stream's speed?
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