A swimmer covers a distance of 28 km against the current and 40 km in – McqOptions

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1.	A swimmer covers a distance of 28 km against the current and 40 km in the directions of the current. If in each case he takes 4 hours, then the speed of the current is ?
A.	1.5 km/hr
B.	3.5 km/hr
C.	2.5 km/hr
D.	None of these
Answer» B. 3.5 km/hr

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