The top of a 35-foot ladder is sliding down a wall at a rate of 15 feet per second. How fast is the base of the ladder sliding away from the wall at the instant when the top of the ladder is 21 feet from the ground? HINT [See Example 2.]
The top of a 35-foot ladder is sliding
down a wall at a rate of 15 feet per second. How fast is the base of the ladder sliding away from the wall at the instant when the top of the ladder is 21 feet from the ground? HINT [See Example 2.]
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