[" A river "2km" wide is flows at the ra...

[" A river "2km" wide is flows at the rate of "2km/h" .A "],[" boatman who can row a boat at a speed of "],[4km/h" in still water,goes a distance of "2km],[" upstream and then comes back.The time taken by "],[" him to complete his journey is "],[[" (1) "60min," (2) "70min],[" (3) "80" min "]]

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[" A river "2km" wide is flows at the rate of "2km/h" .A "],[" boatman who can row a boat at a speed of "],[4km/h" in still water,goes a distance of "2km],[" upstream and then comes back.The time taken by "],[" him to complete his journey is "],[[" (1) "60min," (2) "70min],[" (3) "80" min "]]

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