Jawabanmu

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2014-04-22T22:49:01+07:00
V=1/3  \pi r^2t maka 4710=1/3 \pi .15.15.t. jadi t =20cm. luas kerucut =  \pi r^2+ \pi rs=3,14.15.15+3,14.15.25=1884
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