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Math Help - Volume of shape (NON CALC)

  1. #1
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    Volume of shape (NON CALC)

    WITHOUT using a calculator (non-calc paper), you have to find the volume of this shape.. NOw i know the volume of a pyramid is 1/3 x base area x height, but this is hard without a calculator.. how would you do this?

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  2. #2
    Forum Admin topsquark's Avatar
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    Quote Originally Posted by Danielisew View Post
    WITHOUT using a calculator (non-calc paper), you have to find the volume of this shape.. NOw i know the volume of a pyramid is 1/3 x base area x height, but this is hard without a calculator.. how would you do this?

    The volume of the pyramidal section is
    \frac{1}{3} \cdot (5 \cdot 5) \cdot 6 \, cm^3

    = \frac{1}{3} \cdot 25 \cdot 6 \, cm^3

    It doesn't matter what order we multiply or divide in, so divide the 6 by 3:

    = 25 \cdot 2 \, cm^3 = 50 \, cm^3

    Can you do the rest?

    -Dan
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  3. #3
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    Sorry i cannot see and don't understand the symbols in between your working out... can you explain or redo it using x for multiply.. or just make it clearer?

    Thanks..
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  4. #4
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    oh wait sorry i get it.. all those weird little signs are 'x' signs? (*)
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  5. #5
    is up to his old tricks again! Jhevon's Avatar
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    Quote Originally Posted by Danielisew View Post
    oh wait sorry i get it.. all those weird little signs are 'x' signs? (*)
    yes, the dots mean multiplication. so what's your final answer?
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  6. #6
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    300cm cubed..?
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  7. #7
    is up to his old tricks again! Jhevon's Avatar
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    Quote Originally Posted by Danielisew View Post
    300cm cubed..?
    are you asking me or telling me?


    EDIT: You are correct! did you use a calculator?
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  8. #8
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    haha no, 5 times 5 is 25
    25 x 10 is 250.. + 50.. easy!
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