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A fisherman can slow 2 km against the st...

A fisherman can slow 2 km against the stream in 20 min and return in 15 min. What is the speed of the current?
(A) 1 km/h (B) 6 km/h (C) 10 km/h (D) 2 km/h

A

A

B

C

C

B

D

D

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