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198 = 2.p.6 + 2.p.3 + 2.6.3
198 = 12p + 6p +36
198 - 36 = 18p
162 = 18p
p = 162/18 = 9 cm
Lp Kubus= 6.s²
96 = 6.s²
s² = 96/6
s² = 16
s = √16 = 4 cm
Volume = s³ = 4³ = 64 cm³