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x 8
r = 4
tinggi tabung = 20 -8
= 12
Lp bola = 4 x r² x
= 4 x 4² x
= 64
Lselimut tabung
Ls= 2 x x r x t
= 2 x 4 x 12 x
= 8 x 12 x
= 96
maka luas seluruhnya
jadi jawabannya adalah