- A14
- B3
- C17
- D28
Step-by-Step Solution
Downstream speed = 51 ÷ 3 = 17 km/h; upstream speed = 33 ÷ 3 = 11 km/h. Still-water speed = (17 + 11) ÷ 2 = 14 km/h.
Answer: A) 14
A ferry on the Brahmaputra covers 51 km downstream in 3 hours, while on the way back it covers only 33 km upstream in 3 hours. What is its speed in still water (in km/h)?
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