Diameter = 10 cm -> jari-jari = 5 cm
Luas alas tabung = πr²
Luas alas tabung = 3,14 × 5 × 5
Luas alas tabung = 78,5 cm²
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Diameter = 10 cm -> jari-jari = 5 cm
Luas alas tabung = πr²
Luas alas tabung = 3,14 × 5 × 5
Luas alas tabung = 78,5 cm²