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t=25 cm
π=3,14
dit=Luas tabung?
JAWAB:
L. T= 2πr(r+t)
=2 x 3,14 x 20 cm (20 cm +25 cm)
=2 x 3,14 x 20 cm (45 cm)
=2 x 62,8 cm (45 cm)
=125,6 cm (45 cm)
=5.652 cmkuadrat {C}
maaf aku hanya tau yang nomor 1 saja :(