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

A.	4 kmph	B.	6 kmph
C.	8 kmph	D.	Data inadequate

Answer and Explanation

Answer:6 kmph

Explanation:
Rate downstream = 16/2 kmph = 8 kmph ; Rate upstream = 16/4 kmph = 4 kmph
Hence, Speed in still water = ½ (8 + 4) kmph = 6 kmph

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