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Math Help - Area HELP

  1. #1
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    Area HELP

    Area HELP


    800cm(cubed) of milk is to be stored in a container.

    what area of metal is required to make a carton 16 cm high of square cross-section so that it will hold the milk?
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  2. #2
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    Quote Originally Posted by nodzak1992 View Post
    Area HELP


    800cm(cubed) of milk is to be stored in a container.

    what area of metal is required to make a carton 16 cm high of square cross-section so that it will hold the milk?

    Say the side of the square base has length x.

    Ask yourself...
    What's the area of the base in terms of x?
    What's the volume in terms of x?
    If this volume = 800 then what is x?

    With that value of x what are the areas of the six rectangular faces?
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  3. #3
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    is the base 800/6 = 133.3
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  4. #4
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    Quote Originally Posted by nodzak1992 View Post
    is the base 800/6 = 133.3

    If the base is a square with sides of length x what is the area of the base in terms of x?
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    x squared?
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  6. #6
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    Quote Originally Posted by nodzak1992 View Post
    x squared?
    Correct. So what is the volume in terms of x?
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  7. #7
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    whats the equation for the volume
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  8. #8
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    Volume of a cuboid = length x width x height
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  9. #9
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    (x) x 800 x 16?
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  10. #10
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    No. Just write an expression for the volume in terms of x.
    Leave the 800 out for now.
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  11. #11
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    (x) x 16 x (x) squared?
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  12. #12
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    Do you mean 16x^2 ?

    That's correct.

    So since this is the volume 16x^2=800.

    Can you solve that to find the value of x?
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  13. #13
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    squared root of 784 = 28 ?
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  14. #14
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    No, don't subtract 16.

    Divide both sides of the equation by 16

    16x^2=800

    x^2=800/16

    x^2=50

    Now square root both sides.

    What are things like in your maths class? Chaotic?
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  15. #15
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    x = 7.07 , now what?


    yeah very !
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