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Mathematics 7 Online
OpenStudy (anonymous):

What is the exterior surface area of the light fixture?

OpenStudy (anonymous):

OpenStudy (saifoo.khan):

Surface area is always exterior?

OpenStudy (saifoo.khan):

Do you know the formula for surface area of cylinder? use that and divide it by 2.

OpenStudy (anonymous):

so i did that and got 254.34, is that correct because it's not matching up with any of the answer options which are : 45π in2 54π in2 108π in2 180π in2

OpenStudy (saifoo.khan):

do a thing, dont solve the pi thing. in your calc, solve withoutpi

OpenStudy (anonymous):

i got the answer of 45 but would it still be correct even if i don't use pi?

OpenStudy (saifoo.khan):

but in the options as u can see there's a "pi" already,

OpenStudy (anonymous):

Oh, you're right, silly me, thanks!

OpenStudy (saifoo.khan):

No worries. ;)

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