geometry homework help | Mathematics | Page 1

gentle dirgeBOT Jul 6, 2023, 9:29 PM

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atomic pollenBOT Jul 6, 2023, 9:29 PM

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flowiery

halcyon flare Jul 7, 2023, 12:19 PM

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So if you draw the cone in 2d version from the side

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The areas of the circles on the top and bottom are 81 and 144 pi so 225pi

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And the curved surface area of a cone is the two radiuses added together multiplied by the slant height times pi

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So 9+12=21 3^2+4^2=5^2 21*5=105pi

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The total surface area is 105+225=330pi

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The volume of a frustum is

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Pi H/3 (r^2+R^2+Rr)

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So it's pi * 4/3 * (81+144+108)=225+108=333 so 333* 4/3* pi = 444pi

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444pi is the volume

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444+330=774pi

cinder hedge Jul 7, 2023, 5:56 PM

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.solved

#geometry homework help