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Math 31 Rates of change

  1. Apr 13, 2005 #1
    I need help with the question: The height h of an equilateral triangle is increasing at a rate of 3cm/min. How fast is the area changing when h is 5 cm.
  2. jcsd
  3. Apr 13, 2005 #2


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    What's the area?What's the height?Can u write the former as a function of the latter?

  4. Apr 14, 2005 #3

    James R

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    You want [itex]dA/dt[/itex]. Use the chain rule:

    [tex]\frac{dA}{dt} = \frac{dA}{dh} \frac{dh}{dt}[/tex]

    Of course, you'll need to work out what the two derivatives on the right are.
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