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dit:
LP tabung = luas selimut + luas alas x 2
= (20 × 44) + (22/7 × 7² × 2)
= 880 + 308
= 918 cm²
Tinggi=20cm
Diameter=14
Jari jari= 14:2=7
Luas= π×r²
= 22/7 × 7²
= 22×1×7
= 154 cm²
Volume= L.Alas× tinggi
= 154 cm² × 20 cm
= 3080 cm³