A ladder 10 m long is leaning against a wall. If the base of the ladder is sliding away from the wall at the rate of 1 m per

Question

A ladder 10 m long is leaning against a wall. If the base of the ladder is sliding away from the wall at the rate of 1 m per second, at what instantaneous rate, d/dt, will the top of the ladder be moving when the base of the ladder is 6 m from the wall?

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