As shown in the diagram, Diagonal Drive, which is straight and level, connects A and B. While Diagonal Drive is closed for repairs, drivers starting at A must take a detour and travel 3 miles due south, then 8 miles due west, and finally due south to arrive at B. How many miles long is Diagonal Drive from ,4 to Bl
(1) Before Diagonal Drive was closed, driving on it from A to 5 at an average speed of 30 miles per hour took 20 minutes.
(2) The total distance drivers drive south on the detour is 4 miles less than the length of Diagonal Drive between A and B.
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