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A man can row a boat at 8 km/h in still water. If the speed of the water current is 2 km/h and it takes him 2 hours to row to a place and come back, how far off (in km) is the place?
A man can row a boat at 8 km/h in still water. If the speed of the water current is 2 km/h and it takes him 2 hours to row to a place and come back, how far off (in km) is the place?
Updated On: Oct 28, 2024
- 7.5 km
- 6 km
- 9.5 km
- 10 km
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The Correct Option is A
Solution and Explanation
Speed downstream = 10 km/h, speed upstream = 6 km/h. Total time = $\frac{d}{10} + \frac{d}{6} = 2$ hours. Solving for $d$ gives $d = 7.5$ km.
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