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= π r² + 2 π r t
= 22/7 . 7² + 2 . 22/7 . 7 . 15
= 154 + 660
= 814 cm²
s = √(24)² + (7)²
s = √625
s = 25 cm
Ruas Kerucut = Luas selimut kerucut
= π r s
= 3,14 . 7 . 25
= 550 cm²
Luas permukaan bangun tersebut adalah 814 + 550 = 1364 cm²
Jawabannya adalah C