d = 56 cm
r = 28 cm
Lp = 2πr (r+t)
= 2 × 3,14 × 28 (28+65)
= 175,84 × 93
= 16.353,12 cm²
semoga membantu
Luas permukaan tabung tertutup
= luas alas + luas tutup + luas selimut
= π.r² + π.r² + 2.π.r.t
= 2.π.r² + 2.π.r.t
= 2.22/7.28² + 2.22/7.28.65
= 4928 + 11440
= 16368 cm²
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d = 56 cm
r = 28 cm
Lp = 2πr (r+t)
= 2 × 3,14 × 28 (28+65)
= 175,84 × 93
= 16.353,12 cm²
semoga membantu
Luas permukaan tabung tertutup
= luas alas + luas tutup + luas selimut
= π.r² + π.r² + 2.π.r.t
= 2.π.r² + 2.π.r.t
= 2.22/7.28² + 2.22/7.28.65
= 4928 + 11440
= 16368 cm²