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Multiple Choice Questions

A boat goes 4 km against the current of the stream in 1 hour and goes 1 km along the current in 10 m...........

Quantitative Aptitude(IBPS RRB CL) Boats and Streams

A boat goes 4 km against the current of the stream in 1 hour and goes 1 km along the current in 10 minutes. How long will it take to go 15 km in stationary water?

2 hour 15 min

2 hour

3hr

3hr 30 min

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Explanation:

Rate downstream = 1/10 * 60 = 6kmph
Rate upstream = 4 km/hr.
Speed in still water = ½ * 10 = 5 kmph
Required time = 15/5 = 3 hr

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A boat goes 4 km against the current of the stream in 1 hour and goes 1 km along the current in 10 m...........

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