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88=22/7 x d
d = 7/22 x 88
d = 28 jadi r = 14
luas tabung = 2r (r+t)
= 2x22/7x 14 (14+12)
= 88 (26)
= 2288
t tabung = 12 cm
ditanyakan : L tabung = ?
jawab : k alas = 22/7 x d
88 cm = 22/7 x d
28 cm = d
14 cm = r
L tabung = 22/7 x d (r + t)
= 22/7 x 28 (14 + 12)
= 88 x 26
= 2288 cm²
maaf kalo salah