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18 November, 11:37

The volume of a pentagonal pyramid is 28 in3. What is the volume if the measures of the pyramid are multiplied by 4?

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  1. 18 November, 11:40
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    Volume of a pentagonal pyramid = Area of base x height

    Since every dimension is multiplied by 5,

    Area is multiplied by 5² and height by 5

    So volume is multiplied by 5^3 = 125

    The volume = 125 x 32 = 4000 in^3
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