A man on the top of a vertical observation tower observes a car moving at a unif

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Question

A man on the top of a vertical observation tower observes a car moving at a uniform speed coming directly towards it. If it takes 12 minutes for the angle of depression to change from 30° to 45°, how soon after this will the car reach the observation tower ?

Options:

A . 14 min. 35 sec.

B . 15 min. 49 sec.

C . 16 min. 23 sec.

D . 18 min. 5 sec.

Answer: Option C

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