- A6 km/h
- B9 km/h
- C3.75 km/h
- D24 km/h
Step-by-Step Solution
15 + s = 4(15 − s) ⇒ 5s = 45 ⇒ s = 9. Upstream = 15 − 9 = 6 km/h (downstream 24 km/h).
Answer: A) 6 km/h
Over the same stretch, it takes Ashok four times as long to row upstream as downstream. His speed in still water is 15 km/h. What is his upstream speed?
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