At what rate is the top of the ladder descending

Reference no: EM131175542

A 15 foot ladder is leaning against a vertical wall and its base is on level ground. The bottom of the ladder is being pulled away from the wall at a rate of 4 feet per minute. At what rate is the top of the ladder descending when the top of the ladder is 12 feet above the ground?

Reference no: EM131175542

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