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A man on the top of a vertical 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 `30^0to45^0,` how soon after this will the car reach the tower? Give your answer to the nearest second.

A

`9(1+sqrt(3))`

B

`18(sqrt(3)-1)`

C

`(9)/(2)(sqrt(3)-1)`

D

`18(1+sqrt(3))`

Text Solution

Verified by Experts

The correct Answer is:
A
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