Height and DistanceHard

Question

An observer on the top of a tree, finds, the angle of depression of a car moving towards the tree to be 30o.  After 3 minutes this angle becomes 60o.  After how much more time, the car will reach the tree -

Options

A.4 min.
B.4.5 min.
C.1.5 min.
D.2 min.

Solution

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