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November 08, 2025, 06:34:45 am
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Author Topic: Diffierentiation  (Read 636 times)  Share 

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chuckjefster90

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Diffierentiation
« on: September 24, 2009, 08:44:28 pm »
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need helps on this question

Water draining from a cone shaped funnel at a rate of 500 cm3/min. The cone has a base radius of 20cm and a height of 100cm. let h cm be the depth of the water in the funnel at t minutes. The rate of decrease of h in cm/min is given by?

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m@tty

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Re: Diffierentiation
« Reply #1 on: September 24, 2009, 08:51:45 pm »
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What is the answer?
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Flaming_Arrow

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Re: Diffierentiation
« Reply #2 on: September 24, 2009, 08:54:18 pm »
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you have to use similar triangles

r/h = 20/100

r = h/5

sub that into V= 1/3 pi r^2h
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chuckjefster90

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Re: Diffierentiation
« Reply #3 on: September 24, 2009, 10:40:38 pm »
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Thanks Cheers
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