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Keliling = 2πr
= 2 × 3,14 × 10
= 62,8 cm.
Langkah kedua : Hitung luas selimut
Luas selimut = keliling alas tabung × tinggi
= 62,8 × 12
= 753,6 cm².
=2×3,14×10×12
=753,6 cm³