Jawabanmu

2014-06-17T13:28:15+07:00
Dik: d = 18
r = 9
V = 1.188 cm3
Dit: t = ?
Jwb : Vk = 1/3 π r^2 t
1188 = 1/3 3,14 9^2 t
1188 = 84,78027 t
t = 1188/ 84,78027
t = 14,01269 cm
Di bulatkan jadinya 14 cm.
2014-06-17T13:30:16+07:00
R = d : 2
  = 18 : 2
  = 9 cm

Luas alas = π × r²
               = 3,14 × 9²
               = 3,14 × 81
               = 254,34 cm²

t = V : luas alas × 3
  = 1188 : 254,34 × 3
  = 4,67 × 3
  = 14,012 cm
  ≈ 14 cm

Semoga membantu :)
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