Tolong bantu jawab soal tentang bangun ruang berikut ya no 1-3
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V.total = V.Tabung besar + V.Tabung kecil + V.kerucut
r.besar = 21 cm , r.kecil = r.kerucut = 6 cm
t.besar = 16 cm , t.kerucut = 12 cm , t.kecil = 38 - 16 - 12
= 10 cm
V.total = π.21².16 + π.6².10+ 1/3 . π.6².12
= 2π(21².8+6².5+1/3.6².6)
= 2π(21².8+6².5+6².2)
= 2π(441.8+6²(5+2))
= 2π(441.8+36.7)
= 2π.4(441.2+9.7)
= 8π(882+63)
= 8π(945) <= π ≈ 22/7
≈ 8.22/7(945)
≈ 8.22.135
≈ 176.135
≈ 23760 cm³