Two boats `A` and `B` moved away from a boy anchored in the middle of a river. `A` moved along the river and `B` at fight angle to it Having moves off equal destances from the boy, the boats returned. Find the ratio of the times of motion of the boats, if the velocity of each boat with rspect to still warer in `eta` times greater than the velocity of warer current.

Two boats A and B moved away from a buoy anchored in the middle of a river along the mutually perpendicular straight lines. A moved along the river and B at fight angle to it Having moves off equal destances from the boy, the boats returned. Find the ratio of the times of motion of the boats, if the velocity of each boat with rspect to still warer in eta times greater than the velocity of warer current.

Two boats A and B moved away from a buoy anchored in the middle of a river along the mutually perpendicular straight lines. A moved along the river and B at fight angle to it Having moves off equal distances from the boy, the boats returned. Find the ratio of the times of motion of the boats, if the velocity of each boat with respect to still water in eta =1.2 times greater than the velocity of water current.

Two boats, A and B, move away from a buoy anchored at the middle of a river along the mutually perpendicular straight lines: the boat A along the rive, and the boat B across the river. Having moved off an equal distance from the buoy the boats returned. Find the ratio of times of motion of boats tau_A//tau_B if the velocity of each boat with respect to water is eta=1.2 times greater than the stream velocity.

Two boats, A and B , move away from a point P at the middle of a river along the mutually perpendicular straight lines. Boat A moves along the river and boat B across the river. Having moved off equal distance from point P the boats returned. find the ratio of times of motion of boats (t_(A))/(t_(B)) if v=etau(etagt1) . ( v : velocity of boat with respect to water. u : stream velocity)

Two boats A and b move away form a buoy anchored at the middle of a river along mutually perpendicular staight line. The boat A moves along the stream and the boat B across the river. After moving off an equal distance of 500 metre form the buoy both the voats returned to their original position. Find the ratio of the time taken by boat A to that taken by boat B if the velocity of ecah boat with respect to water is 20m//s and the stream velocity si 10m//s .

Show that a boat must move at an angle with respect to river water in order to cross the river in minimum time .