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A ladder 20 ft long leans against a vert...

A ladder 20 ft long leans against a vertical wall. If the top end slides downward at the rate of 2 ft/s, find the rate at which the lower end moves on a horizontal floor when it is 12 ft from the wll. Find also the rate at which the slope of the ladder changes.

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The correct Answer is:
`-(25)/(54)`
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CHHAYA PUBLICATION-SIGNIFICANCE OF DERIVATIVE AS RATE OF CHANGE-SAMPLE QUESTIONS FOR COMPETITVE EXAMINATION
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