A boat moves down stream at the rate of 1 km in 6 minutes and upstream at the ra

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✪ Choose the correct option.

A boat moves down stream at the rate of 1 km in 6 minutes and upstream at the rate of 1 km in 10 minutes. The speed of current is?

A. 3 kmph
B. 2 kmph
C. 6 kmph
D. 5 kmph

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