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Mathematics 19 Online
OpenStudy (anonymous):

Find the lateral area of the solid figure. 12√7pi sq. in. 48pi sq. in. 60pi sq. in.

OpenStudy (anonymous):

@dtuniyants

OpenStudy (anonymous):

yes just a sec

OpenStudy (anonymous):

do you want an answer, or an explanation?

OpenStudy (anonymous):

both cause sometimes i get too confused

OpenStudy (anonymous):

@SolomonZelman

OpenStudy (anonymous):

lteral surface area is total surface area minus bases

OpenStudy (anonymous):

I just don't know how to find the surface area of cone. sorry

OpenStudy (anonymous):

I found the formula for its surface area A=pi*r(r+sqrt(h^2+r^2)

OpenStudy (solomonzelman):

lol, the google gets a gold medal

OpenStudy (anonymous):

just plug in values of r and h

OpenStudy (anonymous):

I got approximately 301.59

OpenStudy (anonymous):

just sec I'll write solution for exact answer

OpenStudy (anonymous):

\[A=\pi*6(6+\sqrt(64+36))=\pi*6(6+10)=16*6*\pi=96\pi\]

OpenStudy (anonymous):

do you have such answer @hhelpplzzzz

OpenStudy (anonymous):

nope, the ones on top are the only ones

OpenStudy (anonymous):

that's strange. but none of these work. they don't result ~~301.59

OpenStudy (anonymous):

even google says so

OpenStudy (anonymous):

sorry not surface area LATERAL AREA

OpenStudy (anonymous):

96pi-(pi*6^2)=96pi-36pi=60pi

OpenStudy (anonymous):

the answer is 60pi

OpenStudy (anonymous):

thank you very much:))

OpenStudy (anonymous):

make sure you are using the right height, because the cone height is different from the lateral height

OpenStudy (anonymous):

oh, nvm

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