Boats and Streams

Math and Mental Ability

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In one hour, a boat goes 11 km/hr along the stream and 5 km/hr against the stream. The speed of the boat in still water (in km/hr) is:

3

5

8

9

Explanation:

Speed in still water =1/2(11 + 5) kmph = 8 kmph

Hence, option 3 is the correct answer.

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