A boat goes 12 km upstream in 4 hours. Speed of stream is 1 km/h. Speed of boat?
A2
B3
C4
D5
Explanation
Upstream speed = 12/4 = 3. B – 1 = 3 => B = 4.
Exam Relevance
- Topic: Speed, Time & Distance
- Subtopic: Boats and Streams

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