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November 9th, 2017, 02:41 PM   #1
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Related rates ladder problem

A 20m ladder leans against the wall. If the bottom of the ladder slides away from the wall horizontally at 4m/s, how fast is the ladder sliding down the wall, when the top of the ladder is 8m from the ground?
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November 9th, 2017, 03:33 PM   #2
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Seems like you need help with related rates based on your past posts! What is your thought process? Do you have any work for the problem that you have done yet?
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November 9th, 2017, 04:51 PM   #3
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Quote:
Originally Posted by igorrrawr View Post
A 20m ladder leans against the wall. If the bottom of the ladder slides away from the wall horizontally at 4m/s, how fast is the ladder sliding down the wall, when the top of the ladder is 8m from the ground?
Always start by making a sketch whenever possible ...



do you recognize a well-known geometrical relationship between x and y?

write the equation for that relationship, take the derivative of that equation w/respect to time (implicitly), then substitute the given/calculated values to answer the question.
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November 10th, 2017, 09:45 AM   #4
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Quote:
Originally Posted by skeeter View Post
Always start by making a sketch whenever possible ...



do you recognize a well-known geometrical relationship between x and y?

write the equation for that relationship, take the derivative of that equation w/respect to time (implicitly), then substitute the given/calculated values to answer the question.
Thanks a lot, solved it!!!
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