Answers ( 3 )
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    The solution is good

    The total velocity of the two vehicles is: 

                           (40 + 45) = 85 (km/giờ)

    The long AB distance is: 

                            85 x 3 = 255 (km)

                                Answer : 255 km 

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    90 degrees

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    I think \(x=3;y=8\)