A 13-ft ladder leans against a wall. The bottom slides away at 2 ft/s. When the bottom is 5 ft from the wall, how fast (in ft/s) is the top sliding down?
- A
- B
- C
- Dcheck_circle
Explanation
. At : . Differentiate: . . Speed downward = 5/6 ft/s.
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AP Calculus AB· difficulty 4/5
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