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A man is moving away from a tower 41.6m ...

A man is moving away from a tower 41.6m high at a rate of `2ms^(-1)`. If the eye level of the man is 1.6m above the ground, then the rate at which the angle of elevation of the top of the tower changes, when he is at a distance of 30 m from the foot of the tower, is:

A

`-4/125` radian/s

B

`2/25` radian/s

C

`-1/625` radian/s

D

None of these

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The correct Answer is:
A
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