- A1 km
- B0.8 km
- C1.4 km
- D0.6 km
Step-by-Step Solution
Crossing time = 0.8 ÷ 4 = 0.2 h; drift = km. Actual path = √ km (a 3-4-5 triangle).
Answer: A) 1 km
A ferry is steered straight across a river 0.8 km wide at 4 km/h relative to the water, while the current flows at 3 km/h. What distance does the ferry actually travel over the ground?
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