Question: A 50-ft ladder is placed against a building. The top of the ladder is sliding down the building at the rate of 2 ft per

A 50-ft ladder is placed against a building. The top of the ladder is sliding down the building at the rate of 2 ft per minute. Find the rate at which the base of the ladder is slipping away from the building at the instant that the base is 30 ft from the building.

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