Jawab:
2904 cm²
Penjelasan dengan langkah-langkah:
L= 2π r² + 2π r t
= 2 (22/7) × (14) × (14) + 2 (22/7)× (14) ×(30)
= 44× (2) (14) + 44 ×(2) (30)
= 88 × (14) + 88 × (30)
= 1.232 + 2.640
= 3.872 cm²
•Luas permukaan yang belum dicat
= L tabung - L dicat
= 3.872 cm² - 968 cm²
= 2904 cm²
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Jawab:
2904 cm²
Penjelasan dengan langkah-langkah:
L= 2π r² + 2π r t
= 2 (22/7) × (14) × (14) + 2 (22/7)× (14) ×(30)
= 44× (2) (14) + 44 ×(2) (30)
= 88 × (14) + 88 × (30)
= 1.232 + 2.640
= 3.872 cm²
•Luas permukaan yang belum dicat
= L tabung - L dicat
= 3.872 cm² - 968 cm²
= 2904 cm²