A man is moving away from a tower 41.6m high at a rate of 2 m/s. If the eye level of the man is 1.6 m 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 man is moving away from a tower 41.6m high at a rate of 2 m/s. If th

1.	A man is moving away from a tower 41.6m high at a rate of 2 m/s. If the eye level of the man is 1.6 m 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.	\[-\frac{4}{125}rad/s\]
B.	\[-\frac{2}{25}rad/s\]
C.	\[-\frac{1}{625}rad/s\]
D.	None of these
Answer» B. \[-\frac{2}{25}rad/s\]

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A man is moving away from a tower 41.6m high at a rate of 2 m/s. If the eye level of the man is 1.6 m 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

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