Question:
A motorboat can travel in still water at the speed 15 km/h, while the speed of the current is 3 km/h. Time taken by boat to go 36 km upstream is:
A motorboat can travel in still water at the speed 15 km/h, while the speed of the current is 3 km/h. Time taken by boat to go 36 km upstream is:
Updated On: Mar 27, 2026
- 2 hr
- 3 hr
- 12 hr
- 18 hr
Show Solution
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The Correct Option is B
Solution and Explanation
The boat is moving at \(15\ km/h\) in still water and the current is moving at \(3\ km/h\)
Therefore, the boat's effective speed upstream = \(15\ km/h - 3\ km/h \) = \(12\ km/h\)
Now, Time taken by boat to go 36 km upstream = \(\frac {36\ km}{12\ km/h}\) = 3 hr
So, the correct option is (B): 3 hr.
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