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OpenStudy (anonymous):
A standard drinking straw is 19.5 cm long and has a diameter of 0.6 cm. How many square centimeters of plastic are used in one straw? *please help i will medal*
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OpenStudy (hlambach):
So basically you are finding the surface area of a cylinder. SA = 2πrh + 2B R = radius of base H = Height B = area of base Tip: a straw doesn't use plastic at the two bases.
OpenStudy (anonymous):
So it would be 36.8 cm then?
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