anonymous
  • anonymous
Renata is completing a craft project that involves covering only the lateral surface of a cylindrical container with fabric. The cylinder has a height of 12.8 in. and a radius of 15.1 in. To the nearest square unit, how much fabric does she need for this project? Use a calculator. A. 1,214 in.2 B. 2,040 in.2 C. 2,647 in.2 D. 1,931 in.2
Mathematics
jamiebookeater
  • jamiebookeater
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zepdrix
  • zepdrix
Hmm, so what type of problem is this? Volume? Surface Area? Can you tell based on the way it's worded? :)
anonymous
  • anonymous
wellll is said surdace
zepdrix
  • zepdrix
Yesss good :D Do you remember the formula for Surface Area of a Cylinder? \[\huge A=2\pi r^2+2\pi r h\] But in this problem, we only care about the LATERAL area, so we'll ignore the area of the top and bottom.\[\huge A=2\pi r h\]

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zepdrix
  • zepdrix
From here it shouldn't be too bad! Just plug in the numbers they gave you. :D Lemme know if you're stuck on any part.
anonymous
  • anonymous
so is 2pi*r*h
zepdrix
  • zepdrix
yes, that will give you the amount of lateral area that you need to cover with fabric. they gave you -r and h- in the question. If your calculator doesn't have a PI button, use 3.14, you should still get close to the correct answer.

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