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Core Maths 3: Integration to find a volume

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    Hi there

    Please could someone check the below, as I am getting a different answer to whats in the book;



    Many thanks
  2. Offline

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    You have substituted incorrectly on the final line
  3. Offline

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    (Original post by TenOfThem)
    You have substituted incorrectly on the final line
    Sorry to be a jummy but please could you tell me how I have gone wrong.

    Thank you
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    2 squared = 4

    1/2 of 4 = 2

    2/2 = 1


    you got 1/2
  5. Offline

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    edit: my bad ignore me im being blind sorry

    shouldnt you be integrating  (\pi x^2) dy instead of  (\pi x) dy ?
  6. Offline

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    (Original post by just george)
    shouldnt you be integrating  (\pi x^2) dy instead of  (\pi x) dy ?
    she did
  7. Offline

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    (Original post by TenOfThem)
    she did
    I see, sorry ignore me im being blind.. happy easter
  8. Offline

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    (Original post by just george)
    I see, sorry ignore me im being blind.. happy easter
    T'is the chocolate
  9. Offline

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    (Original post by TenOfThem)
    T'is the chocolate
    its good stuff though.. malteasters.. nomnomnom..

  10. Offline

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    (Original post by just george)
    its good stuff though.. malteasters.. nomnomnom..

    I got a malteaster egg with malteaser bunnies in it
  11. Online

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    (Original post by TenOfThem)
    I got a malteaster egg with malteaser bunnies in it
    I got a malteaser egg with malteasers in it.

  12. Offline

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    (Original post by Mr M)
    I got a malteaser egg with malteasers in it.

    Was yours not a malteasTer egg ... check the box
  13. Online

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    (Original post by TenOfThem)
    Was yours not a malteasTer egg ... check the box
    Nope.
  14. Offline

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    (Original post by Mr M)
    Nope.
  15. Offline

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    ok yeah I see what I did wrong, thank you

    Happy Easter to you all xxx
  16. Offline

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    (Original post by Mr M)
    ..
    (Original post by TenOfThem)
    ....
    Do you both work at the same school?
  17. Offline

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    (Original post by boromir9111)
    Do you both work at the same school?
    No
  18. Offline

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    (Original post by boromir9111)
    Do you both work at the same school?
    Haha.

    Cheeky.
  19. Online

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    (Original post by boromir9111)
    Do you both work at the same school?
    No but I've known her for about 10 years online.
  20. Offline

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    (Original post by Mr M)
    No but I've known her for about 10 years online.
    lol....ok

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Updated: April 8, 2012
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