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anonymous

  • 5 years ago

find the surface area of the space figure. 28 ft by 36 ft.

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  1. anonymous
    • 5 years ago
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    its a cylinder if that helps

  2. anonymous
    • 5 years ago
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    plz help!

  3. anonymous
    • 5 years ago
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    Surface Area = Areas of top and bottom +Area of the side Surface Area = 2(Area of top) + (perimeter of top)* height Surface Area = 2(pi r 2) + (2 pi r)* h

  4. anonymous
    • 5 years ago
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    a cylinder is made up of 3 parts: 2 circles are each end, and a rectangle wrapped around the circles for the main part

  5. anonymous
    • 5 years ago
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    it is a 3dimenton figer

  6. anonymous
    • 5 years ago
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    Surface Area of a Cylinder = 2 pi r 2 + 2 pi r h

  7. anonymous
    • 5 years ago
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    ok, but why is that the case? because there are 2 circles (for the 2 * pi*r^2), then a rectangle which constitutes the middle, the rectangle has height=h, and the width of the rectangle equals the circumference of the circle, which is 2*pi*r

  8. anonymous
    • 5 years ago
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    so the area of the two circles is: 2* (pi*r^2) area of the rectangle is: h * width, where width = 2*pi*r, so -> h*(2*pi*r)

  9. anonymous
    • 5 years ago
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    (h is the height of the cylinder, r is the radius of the top)

  10. anonymous
    • 5 years ago
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    so as glenn pointed out: Surface Area of a Cylinder = 2 pi r 2 + 2 pi r h

  11. anonymous
    • 5 years ago
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    which is area of both circles plus the area of the rectangle

  12. anonymous
    • 5 years ago
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    yes

  13. anonymous
    • 5 years ago
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    hold on wrong chat

  14. anonymous
    • 5 years ago
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    that i am get ing i have not did this in a long time

  15. anonymous
    • 5 years ago
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    Surface Area = 2(pi r 2) + (2 pi r)* h

  16. anonymous
    • 5 years ago
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    yes..

  17. anonymous
    • 5 years ago
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    ok?

  18. anonymous
    • 5 years ago
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    sorry was gone

  19. anonymous
    • 5 years ago
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    dk?

  20. anonymous
    • 5 years ago
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    help?

  21. anonymous
    • 5 years ago
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    yes with what

  22. anonymous
    • 5 years ago
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    ???

  23. anonymous
    • 5 years ago
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    same question

  24. anonymous
    • 5 years ago
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    Surface Area = 2(pi r 2) + (2 pi r)* h

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