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[" 24.Select ALL correct answer "],[" A boat crosses a river at a velocity "vec v" (relative to water) that is constant relative to water and "],[" perpendicular to the banks.The magnitude of the velocity "vec v" is "0.3m/s" .Width of the river is "],[b=63m" .Speed of the current varies according to the parabolic law."],[u=U_(0)-(4u_(0))/(b^(2))(x-(b)/(2))^(2)],[" Where "x" is distance from the banks and "u_(0)" is constant equal to "5m/s" .Choose the correct options."],[[" (A) Drift of the boat during the time it crosses the river is "1050m" ."],[" (B) Drift of the boat during the time it crosses the river is "700m],[" (C) Time taken by the boat to crosses the river is "210sec" ."],[" (D) Time taken by the boat to crosses the river is "12.6sec" ."]]

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