Pool Area question

Hello njwski777. What have you done so far? Where do you need help?

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njwski777 said:
I can’t wrap my head around the concept of da/dh and how the chain rule links in with one another
Cheers
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1st of all it is not da/dh, but rather dA/dh.
Did you do part a? Can we please your answer?
Before you can find dA/dt you will need to 1st find A(h). A(h) is the area of the cross sectional area (the blue area) in terms of h. Can you do that? Maybe breaking up the area into the rectangle area and the two triangular area may help.
Please let us know how you are making out.
 
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