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Apellot7

  • 2 years ago

A firecracker has dimensions as shown. Height is 14 cm, radius is 1 cm and slant height of the cone is 2 cm. Paper covers the entire surface area including the cone, the lateral area and the bottom circle but does not include the tail. What is the best approximate area of paper needed to wrap the firecracker? (Use for . Round your answer to the nearest whole number.)

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  1. Apellot7
    • 2 years ago
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  2. nickymarden
    • 2 years ago
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    you have 2 different shapes. a cilinder and a cone. to calculate the whole area you will need to calculate the total area of the cilinder and the total area of the cone. \[Acone= pi * r^2\] \[Acilinder=2*π*r*h + 2π*r2 \]

  3. Apellot7
    • 2 years ago
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    \[pi=3.14\]

  4. nickymarden
    • 2 years ago
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    yes.

  5. Apellot7
    • 2 years ago
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    can you set the problum up with me?

  6. nickymarden
    • 2 years ago
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    yes, sure.

  7. Apellot7
    • 2 years ago
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    OK

  8. nickymarden
    • 2 years ago
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    \[Acone: 3,14*1^2\]

  9. Apellot7
    • 2 years ago
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    = 3.14

  10. nickymarden
    • 2 years ago
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    \[Acilinder=2*3,14*1*14+2*3,14*1^2\]

  11. nickymarden
    • 2 years ago
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    then: Acone+Acilinder

  12. nickymarden
    • 2 years ago
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    and that is your answer :)

  13. Apellot7
    • 2 years ago
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    hold up please

  14. Apellot7
    • 2 years ago
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    =287.4888

  15. nickymarden
    • 2 years ago
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    :)

  16. Apellot7
    • 2 years ago
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    thats not the answrs i have. thought

  17. Apellot7
    • 2 years ago
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    \[100cm2 power 97cm to 2 power 91cm2 power 104cm2

  18. nickymarden
    • 2 years ago
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    well, those are the formulas :x

  19. Apellot7
    • 2 years ago
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    didd i do the math wrong? can yuu coculated them 2

  20. nickymarden
    • 2 years ago
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    the answer is 97.2

  21. Apellot7
    • 2 years ago
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  22. Apellot7
    • 2 years ago
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    see

  23. nickymarden
    • 2 years ago
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    yees, i just told you the answer lol

  24. Apellot7
    • 2 years ago
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    no...! lol jk

  25. nickymarden
    • 2 years ago
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    haha

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