Boats & Streams · Question 27 · Hard
Boats & Streams question 27
A boat takes 2 hours to cover a certain distance downstream and 3 hours to cover the same distance upstream. If the stream flows at 3 km/h, what is the distance?
- 30 km
- 45 km
- 36 km
- 24 km
Answer and explanation
Answer: C. 36 km
Explanation: (b + 3) × 2 = (b − 3) × 3 gives b = 15 km/h. Distance = 18 × 2 = 36 km (check: 12 × 3 = 36).
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