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Verified answer
1m = 100cm.1,2m = 1,2 × 100 = 120cm.
d = 2r.
84 = 2r.
84/2 = r.
42 = r.
V = π × r² × t.
V = 22/7 × 42² × 120cm.
V = 22/7 × 1.764 × 120.
V = 22 × 252 × 120.
V = 665.280cm³.
V = 665,28dm³/Liter (B).
Verified answer
Kelas 9 MatematikaBab 2 - Bangun Ruag Sisi Lengkung
Tabung
d = 84 cm
d = 8,4 dm
r = 4,2 dm
t = 1,2 m
t = 12 dm
V = πr²t
V = 22/7 × 4,2 dm × 4,2 dm × 12 dm
V = 665,28 dm³
V = 665,28 liter
Jawaban B