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V1 = bagian kepala
r = 1/2(2,8) = 1,4
t = 1 cm
V1 = π r² t = 22/7 (1,4)²(1)= 6,16
V2 = bagian tengah
r = 1/2(1,4) = 0,7
t = 12
V2 = π r² t = 22/7(0,7)²(12) =18,48
V3 = bagian lancip (kerucut)
r = 1/2 x 1,4 = 0,7
t = 3
V3= 1/3 π r² t = 1/3(22/7)(0,7)²)3) = 1,54
V = V1+V2+v3 = 26,18