19.7 km distance far south of its starting point does the Robin land .
What distance?
The amount of space between two places or things is called distance.
It is a numerical qualitative measurement of how far apart objects or points are.
Sol-
Angle B = angle EAB =39°
BC= AB.COS B =21 COS 39°=16.3 km
CD = 36-16.32 =19.7 km
So south of stating point 19.7 km.
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