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Mathematics 42 Online
OpenStudy (anonymous):

Why you can approximate a curve by dx when computing volume but have to approximate by ds when computing surface area?

OpenStudy (experimentx):

i guess because of nature of geometry. the volume would include all the space covered while surface would cover only along the curve.

OpenStudy (anonymous):

I don't get the reasoning behind it...

OpenStudy (experimentx):

|dw:1342999630949:dw| ds would give the arc length

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