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MATH

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the base of a rectangular prism is congruent to the base of a pyramid. The height of the pyramid is 3 times the height of the prism. Which figure has a greater volume? Explain.

I'm terrible with these kind of word problems. If you could explain that would be great.

  • MATH - ,

    The volume of the rectangular prism
    = base area x height

    the volume of the pyramid
    = (1/3) base x height

    If the height of the pyramid is 3 times the height

    the factor of 3 would cancel the 1/3 of the formula, and their volumes would be equal.

  • MATH - ,

    wai the height of the pyramid is 3 times the height?
    Can you just show how you got it with numbers like how you would on a piece of paper. Thanks!

  • MATH - ,

    let height of prism be h
    let height of pyramid be 3 h, (they said so.)

    volume of prism = (base)(h)

    volume of pyramid = (1/3)(base)(3h)
    = (base)(h)

    They are the same !

  • MATH - ,

    ooohhhhh! I get it now! thanks so much!

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