From point \( A \) located on a highway (Fig. 1.2) one has to get by car as soon as possible to ...

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From point \( A \) located on a highway (Fig. 1.2) one has to get by car as soon as possible to point \( B \) located in the field at a distance \( I \) from the highway. It is known that the car moves in the field \( \eta \) times slower than on the highway. At what distance from point \( D \) one
Fig. \( 1.2 \) must turn off the highway?
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