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anonymous

  • one year ago

PLEASE PLEAS HELP I WILL MEDAL!!!! AND FAN how do you find the surface area and latreal of a clylinder?????

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  1. anonymous
    • one year ago
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    area = 2 · π · r · (r + h)=surface area

  2. anonymous
    • one year ago
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    lateral area = 2*3.14*rh

  3. anonymous
    • one year ago
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    A=2πrh+2πr2

  4. anonymous
    • one year ago
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    A=2πrh+2πr^2

  5. anonymous
    • one year ago
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    I must be doing it wrong because ive tried both ways and i still get it wrong

  6. anonymous
    • one year ago
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    what are the figures?

  7. anonymous
    • one year ago
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    @lunasee

  8. anonymous
    • one year ago
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    A=2πrh (for lateral area)

  9. anonymous
    • one year ago
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    it says use the net to find the latreal area of the clyinder diamter is 12 hieght is 15

  10. anonymous
    • one year ago
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    also says give your answer in pi , which i dont understand

  11. anonymous
    • one year ago
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    im using the correct formula but i still get it wrong

  12. anonymous
    • one year ago
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    since the diameter is 12 the radius will be 6 since tha radius is half of diameter

  13. anonymous
    • one year ago
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    the answer i got for surface area is 791.68

  14. anonymous
    • one year ago
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    @lunasee

  15. anonymous
    • one year ago
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    thats the same that i got , it still says incorrect

  16. anonymous
    • one year ago
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    probably approximate it

  17. anonymous
    • one year ago
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    565.49 for the lateral area

  18. anonymous
    • one year ago
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    nope , neither work , ive tried it all it still says its incorrect , maybe because it says it needs to be in pi?

  19. anonymous
    • one year ago
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    @kalahkid

  20. anonymous
    • one year ago
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    i guessing you should put pi at the end of the answer??

  21. anonymous
    • one year ago
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    I have tried that too!!! This is driving me insane!!

  22. anonymous
    • one year ago
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    ohhh

  23. anonymous
    • one year ago
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    did you put the units cm or m^2 since its area

  24. anonymous
    • one year ago
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    @lunasee

  25. anonymous
    • one year ago
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    yes i did

  26. anonymous
    • one year ago
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    Do you have to show working??

  27. triciaal
    • one year ago
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    |dw:1433708102566:dw|

  28. anonymous
    • one year ago
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    No i dont have to show my work

  29. triciaal
    • one year ago
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    do you see the cylinder? surface area is made up of 2 circles area of each is Pi * r^2 where r is the radius of the circle and the lateral surface which is like a rectangle if you were to "open" down the side. the length the circumference of the circle, 2*pi* r and the width is the height of the cylinder, h

  30. triciaal
    • one year ago
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    total surface area = 2*pi*r^2 + 2*pi*r*h = 2 *pi*r ( r + h)

  31. anonymous
    • one year ago
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    OHHH ok now its correct!!! THANK YOU

  32. triciaal
    • one year ago
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    the diameter here is 12 which is 2*r so r = 6 the height is 15 substituting in the formula use 3.14 for pi unless told to give exact

  33. anonymous
    • one year ago
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    sorry for not being much help at all @lunasee at least you got the answer..............most important!!!!

  34. anonymous
    • one year ago
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    @kalahkid U did help!! Thank you:) i faned!

  35. triciaal
    • one year ago
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    @lunasee do you have any questions about my detailed response or you just forgot to close the question?

  36. anonymous
    • one year ago
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    Nope! Just forgot to close it lol XD

  37. triciaal
    • one year ago
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    ok

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