Question:
A boat covers 12 km downstream in 2 hours and returns the same distance upstream in 3 hours. The speed of the stream is
A boat covers 12 km downstream in 2 hours and returns the same distance upstream in 3 hours. The speed of the stream is
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Stream speed is half the difference between downstream and upstream speeds.
Updated On: Jul 8, 2026
- 2 km/h
- 1 km/h
- 1.5 km/h
- 0.5 km/h
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The Correct Option is B
Solution and Explanation
Step 1: Downstream speed.
\(\dfrac{12}{2}=6\) km/h.
Step 2: Upstream speed.
\(\dfrac{12}{3}=4\) km/h.
Step 3: Stream speed.
Stream \(=\dfrac{\textrm{down}-\textrm{up}}{2}=\dfrac{6-4}{2}=1\) km/h.
\[\boxed{1\ \textrm{km/h}}\]
\(\dfrac{12}{2}=6\) km/h.
Step 2: Upstream speed.
\(\dfrac{12}{3}=4\) km/h.
Step 3: Stream speed.
Stream \(=\dfrac{\textrm{down}-\textrm{up}}{2}=\dfrac{6-4}{2}=1\) km/h.
\[\boxed{1\ \textrm{km/h}}\]
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