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October 06, 2025, 12:35:16 am
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Author Topic: Related Rates Help  (Read 581 times)  Share 

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tcg93

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Related Rates Help
« on: October 22, 2010, 03:30:33 pm »
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This is from insight 2010 E2

How do you get the (h-25) part it in the first line of the solutions for part ii?
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iffets12345

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Re: Related Rates Help
« Reply #1 on: October 22, 2010, 03:49:05 pm »
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The radius at any point is that horizontal line which you derive from pythagerous' theorem. You know the hypotenuse is 25, but that vertical line is something minus h.
that something if you think carefully is also the initial radius of 25.
So therefore the radius at anypoint is:
square root (625- (25-h)^2)
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98.40_for_sure

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Re: Related Rates Help
« Reply #2 on: October 22, 2010, 04:26:36 pm »
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This question did my head in for 20 minutes...
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