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44 = 44/7 x r
r = 44 x 7/44
= 7
V=22/7 x r² x t
= 22/7 x 49 x 20
= 3080
Jawaban B
44cm=2×22/7×r
44cm=44/7 x r
r = 44cm : 44/7
r = 44 cm x 7/44
r = 7 cm
Luas alas
=Πr²
=22/7 x 7cm x7cm
=154 cm²
v=Luas alas x tinggi
=154 cm² x 20 cm
=3080 cm³
Jawaban : b