Learn how to answer mathematics and engineering questions on this blog.
Question:
A 25ft ladder is leaning against a vertical wall. The bottom of the ladder is pulled horizontally away from the wall at 3 ft/sec. How fast is the top of the ladder sliding down the wall when the bottom of the ladder is 15ft away from the wall?
Answer:
1a)
From the question we know that when x = 15ft, y = 20ft and dx/dt = 3ft/sec. We can input this data into our derived formula.
The top of the ladder is sliding down the wall at the rate of 9/4 ft/sec.
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