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luas permukaan seimut kerucut + luas bola
= () + ()
= (3,14 × [] × 6) + (2 × 3,14 × 6²)
= (3,14 × [] × 6) + (2 × 3,14 × 36)
= (3,14 × × 6) + (2 × 3,14 × 36)
= (3,14 × 10 × 6) + (2 × 3,14 ×36)
= 188,4 + 226,08
= 414,48 cm² (B)
smg membantu...