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Verified answer
Mapel : MatematikaBab : Bangun Ruang Sisi Lengkung
Volume = 1/4 x π x d² x t
308 cm³ = 1/4 x 22/7 x d² x 20 cm
308 cm³ = 440/28 cm x d²
d² = 308 x 28/440
d² = 19,6
d = √19,6
d = 4,42 cm
t = 20 cm
d = ?
V = (phi)xrxrxt
308 = (phi)xrxrx20
308:20 = (phi)xrxr
15,4 = 22/7xr kuadrat
15,4 : 22/7 = r kuadrat
4,9 = r kuadrat
r = 2,213
d = 4,426 cm