Answer :

The figure is given below:

Let aircraft fly at a constant height of y km

and let the distance from a point to the starting point of jet bet x km.

Thus, BD = EC = y km

And, AB = x km

As distance = speed × time.

Distance taken by craft to travel from D to E

Using Trigonometry;

∠ DAB = 45°

∠ EAC = 30°

BC = AC – AB = 2 km

⇒

⇒

⇒

⇒ = 2.732 km

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