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52.
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A
man can row three - quarters of a kilometer against the stream in 11¼minutes.
The speed(in km/hr) of the man in still water is
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|
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A. 2
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B. 3
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C. 4
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D. 5
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Answer:
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Rate
upstream
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=
(750 / 675)m/sec
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=
(10 / 9) m/ sec.
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Rate
downstream
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=
(750 / 450)
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=(5
/ 3) m/sec
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Rate
in still water
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=
1/2(10 /9 + 5/3)
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=
(25/18x18/5)km/hr
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|
= 5
km/hr.
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Title : BOATS and STREAMS Q52
Description : 52. A man can row three - quarters of a kilometer against the stream in 11¼minutes. The speed(in km/hr) of the man in...
Rating : 5
