A boat goes 15 km downstream in 3 hours and 12 km upstream in 4 hours. What is the stream speed?

A0.5 km/h

B1 km/h

C1.5 km/h

D2 km/h

Explanation

Down = 5, Up = 3. Stream = (5-3)/2 = 1.

Exam Relevance

Topic: Speed, Time & Distance
Subtopic: Boats and Streams

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