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Kelas 6 SD
Bab Luas dan Volume
Kata Kunci : Tabung

Keliling alas = 88
2 x π x r = 88
2 x 22/7 x r = 88
r = 88 x 7/44
r = 14 cm

Luas permukaan
= 2 x π x r x (r + t)
= 2 x 22/7 x 14 x (14 + 25)
= 44 x 2 x 39
= 3.432 cm²