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Asumsi pi = 22/7
88= 44/7 x r
r= 14
Volume=pi x r^2 x t
=22/7 x 14x14x20
=12320cm^3
88 = 2 x 22/7 x r
88 = 44/7 x r
88 x 7/44 = r
2x 7 = r
14 = r
volum = π x r² x t
= 22/7 x 14 x 14 x 20
= 44 x 14 x 20
= 12320 cm³