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nomor 9
BAB BANGUN RUANG
Diket:
luas selimut tanpa alas&tutup = π×d×t = 96π
t:r = 3:1
t = 3r
d = 2r

Ditanya volume tabung
Jawab
96π = πdt
96π = π×2r×3r (π dicorek-corek)
96 = 6r²
r² = 16
r = 4
t = 3r = 12

volume = πr²t
= π×4²×12
= 192π

Jawaban A, semoga membantu