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75,36 = 3,14 × d
d=
d=24
r = d ÷ 2
r = 12 cm.
V= × π × r² × t
= × 3,14 × 12² × 18
= 2712,96 cm³
jadi volume kerucut tersebut = 2712,96 cm³
75,36 = 2 3,14 r
75,36 = 6,28 r
12 = r
V kerucut = 1/3 π r t
= 1/3 3,14 12² 18
= 2.713 cm³