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Verified answer
Bab Bangun RuangMatematika SMP Kelas VIII
Kerucut
s = √(r² + t²)
= √(3,5² + 15²)
= √(12,25 + 225)
= √(237,25)
= 15,4 cm
Luas permukaan = π . r . (r + s)
= (22/7) . 3,5 . (3,5 + 15,4)
= 11 . 18,9
= 207,9 cm²