A 30-foot ladder is leaning against a house (see figure) . If the base of the ladder is pulled away from the house at a rate of 2 feet per second, the top will move down the wall at a rate of , where x is the distance between the base of the ladder and the house. Find the rate r when x is 18 feet.
A) r = ft/sec
B) r = ft/sec
C)
ft/sec
D) r = ft/sec
E) r = ft/sec
Correct Answer:
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