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anonymous

  • 5 years ago

can someone help me with surface area of a cylinder calculations

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  1. Owlfred
    • 5 years ago
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    Hoot! You just asked your first question! Hang tight while I find people to answer it for you. You can thank people who give you good answers by clicking the 'Good Answer' button on the right!

  2. anonymous
    • 5 years ago
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    4r 10 h

  3. amistre64
    • 5 years ago
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    whatcha got?

  4. anonymous
    • 5 years ago
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    i need help with surface area of a cylinder the question is 4 r and 10 h. i dont underrstand how to calculate it

  5. amistre64
    • 5 years ago
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    radius=4 and height=10?

  6. amistre64
    • 5 years ago
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    the surface of a cylindar is the circumferenceof the base times its height

  7. amistre64
    • 5 years ago
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    c=2pi r 8pi in this case 8pi * 10 = 80pi for the sides

  8. amistre64
    • 5 years ago
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    if you include the tops and bottoms you figure in for area

  9. amistre64
    • 5 years ago
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    pi r^2 = area ; 4pi for the top and 4pi for the bottom for a total area of 88pi

  10. amistre64
    • 5 years ago
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    ack.....

  11. amistre64
    • 5 years ago
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    4^2 = 16 not 4 .... 80+32 = 112 112pi

  12. anonymous
    • 5 years ago
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    let me make sure i understand this befor you go please

  13. amistre64
    • 5 years ago
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    im here

  14. anonymous
    • 5 years ago
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    4 X 4= 16 how did you get 8 pie

  15. amistre64
    • 5 years ago
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    the edge of a circle equals: 2pi r , the sides of your cylinder are just the outside edge of a circle streched up to 10 right? 2pi (4) = 8pi 8pi (10) = 80pi that is the area of your sidewalls

  16. amistre64
    • 5 years ago
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    you agree?

  17. anonymous
    • 5 years ago
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    im in the 7th grade and trying to understand im sorry

  18. amistre64
    • 5 years ago
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    what do you have questions about?

  19. amistre64
    • 5 years ago
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    i cant read your mind, no matter what grade your in :)

  20. anonymous
    • 5 years ago
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    and you are good at it. thanks for your patience. so they way got the answer is 4X4=16 and then you added 4+4 =8 X 10 = 80 +32 = 112 X 3.14 = 351.68 correct

  21. amistre64
    • 5 years ago
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    yes, that looks to be about right...

  22. anonymous
    • 5 years ago
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    thank you so much i think i got it. you have been very helpfull to me. have a great weekend.

  23. amistre64
    • 5 years ago
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    youre welcome :)

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