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A man rows 40 km upstream in 8 h and a d...

A man rows 40 km upstream in 8 h and a distance of 36 km downstrean in 6 h. Then, speed of the stream is (A) 0.5 km/h (B) 1.5 km/h (C ) 1 km/h (D) 3 km/h

A

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B

A

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C

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D

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