- A2
- B6
- C4
- D3
Step-by-Step Solution
Downstream speed = 20 ÷ 2 = 10 km/h; upstream = 12 ÷ 3 = 4 km/h. Stream speed = (10 − 4) ÷ 2 = 3 km/h.
Answer: D) 3
A boat goes 20 km downstream in 2 hours and 12 km upstream in 3 hours. What is the speed of the stream (in km/h)?
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