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1/3πr²t = 27
r²t = 27×3÷π
r²t= 81 cm÷π
berarti,
1/3π(3r)²2t
1/3 π 9r² 2t
1/3 π 18 (r²t)
6 π (81÷π)
coret π
6×81
486 cm³
jawabannya B kalo ga salah