Discussion :: Boats and Streams
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What is the speed of the boat in still water?
I. The boat covers a distance of 48 kms in 6 hours while running upstream.
II. The boat covers the same distance in 4 hours while running downstream.
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A.
I alone sufficient while II alone not sufficient to answer |
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B.
II alone sufficient while I alone not sufficient to answer |
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C.
Either I or II alone sufficient to answer |
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D.
Both I and II are not sufficient to answer |
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E.
Both I and II are necessary to answer |
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Answer : Option E
Explanation :
I. Speed upstream =\(\frac {48 } { 2 } \)km/hr=8km/hrI.
IISpeed downstream =\(\frac {48 } { 4 } \)km/hr=8km/hr
Speed of the boat =\(\frac { 1 } { 2 } (8+12)\)km/hr=10km/hr
Thus, I and II together give the answer.
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