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rumus volum tabung = π x r² x tinggi
klo setengah tabung jadinya = 1/2 π x r² x tinggi
jdinya
= 1/2 x 3,14 x 15cm x 15cm x 100cm
= 35325 cm pangkat 3
3,14 x 10^2 x 100
3,14 x 10000
31400