* A 5 m pole, leaning against a wall s1ips in such a way that its base is vdun moving away from the wall at a rate of 1.5 m/sec when the base is 4 m from the wall.How fast is the top of the ladder moving down the wall at that instant? C. - 2.0 m/sec D. - 1.5 m/sec A. + 2.0 m/sec + 1.7 m/sec B.

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A: We have to prove by induction.

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A: Solution: Given that

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