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Verified answer
@kristiadisurichmantVerified answer
Bab Bangun RuangMatematika SD Kelas VI
tabung
luas alas = π x r² = 154
22/7 x r² = 154
r² = 154 x 7/22
r = √49
r = 7 cm
luas permukaan = 2 x π x r x (r + t)
= 2 x (22/7) x 7 x (7 + 12)
= 44 x 19
= 836 cm²