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=1/3*22/7*7²*15
=1/3*2310
=770
Vtabung=πr²t
=22/7*7²*18
=2772
V=770+2772
=3542cm³
=22×7×18
=154×18
=2772
Kerucut=1/3×22/7×7×7×15
=22×7×5
=154×5
=770
luas gabungan
=2772+770
=3542