Boats and Streams - Arithmetic Aptitude Questions and Answers

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Discussion :: Boats and Streams

A boat running downstream covers a distance of 16 km in 2 hours while for covering the same distance upstream, it takes 4 hours. What is the speed of the boat in still water?

4 km/hr

6 km/hr

8 km/hr

Data inadequate

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Answer : Option B

Explanation :

Rate downstream = $[\frac { 16 } { 2 }]$ kmph = 8 kmph.

Rate upstream = $[\frac { 16 } { 4 }]$ kmph = 4 kmph.

Speed in still water = $\frac { 1 } { 2 }$ (8 + 4) kmph = 6 kmph.

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