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A man is moving away from a tower 41.6 m 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. |
`-4/125` rad/s |
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B. |
`-2/25` rad/s |
C. |
`-2/625` rad/s |
D. |
none of these |