1.

An aeroplane flies along straight line from A to B and backs again to the same point. There is a steady wind speed v. The distance between A and B is l still air speed of the aeroplane is V, then:

Answer»

Total time for the ROUND trip, if the wind blows along the line AB, is`(2Vl)/(V^(2)-v^(2)`
Total time for the round trip, if the wind blowsperpendicular to the line AB, is `(2l)/(sqrt(V^(2)-v^(2)))`
Total time for the round trip depends on the DIRECTION of wind.
Total time for the round trip is independent of direction of wind.

Answer :A::B::C


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