carilah luas permukaan tersebut
Lp = 2 × π × r × ( r + t )
Lp = 2 × 3,14 × (3 ÷ 2) × ((3 ÷ 2 ) + 4 )
Lp = 2 × 3,14 × 1,5 × ( 1,5 + 4 )
Lp = 2 × 3,14 × 1,5 × 5,5
Lp = 2 × 3,14 × 8,25
Lp = 2 × 25.905
Lp = 51,81 m²
- Luas Permukaan Tabung
2πr ( r + t )
2 × 3,14 × ( 3 ÷ 2 ) ( ( 3 ÷ 2 ) + 4 )
6,28 × 1,5 ( 1,5 + 4 )
9,42 ( 5,5 )
51,81 cm²
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