- A2
- B4
- C12
- D3
Step-by-Step Solution
Downstream speed = 42/3 = 14 km/h, upstream = 30/3 = 10 km/h. Current = (14 − 10)/2 = 2 km/h (12 km/h is the boat's own speed).
Answer: A) 2
Ramesh rows 42 km down the river in 3 hours and 30 km up the river in 3 hours. What is the speed of the current (in km/h)?
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