In a river, a man takes 3 hours in rowing 3 km upstream or 15 km downs – McqOptions

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1.	In a river, a man takes 3 hours in rowing 3 km upstream or 15 km downstream. What is the speed of the current?
A.	2km/hr
B.	4km/hr
C.	6km/hr
D.	9km/hr
Answer» B. 4km/hr

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