The width of a river is 3sqrt(3) km. A b...

The width of a river is 3`sqrt(3)` km. A boat has a velocity of `sqrt(3)` km/s and starts to cross the river in a direction perpendicular to the bank of the river. If the river is flowing with a velocity 2km/sec, find the distance drifted by the boat.

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6 km

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