Penjelasan dengan langkah-langkah:
r = 7 cm
t = 28 cm
a. luas selimut tabung
= 2 x π x r x t
= 2 x 22/7 x 7 x 28
= 44 x 28
= 1.232 cm²
b. luas permukaan tabung
= 2 x π x r(r + t)
= 2 x 22/7 x 7(7 + 28)
= 2 x 22 x 35
= 1.540 cm²
c. volume tabung
= π x r² x t
= 22/7 x 7 x 7 x 28
= 4.312 cm³
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Verified answer
Penjelasan dengan langkah-langkah:
r = 7 cm
t = 28 cm
a. luas selimut tabung
= 2 x π x r x t
= 2 x 22/7 x 7 x 28
= 44 x 28
= 1.232 cm²
b. luas permukaan tabung
= 2 x π x r(r + t)
= 2 x 22/7 x 7(7 + 28)
= 2 x 22 x 35
= 1.540 cm²
c. volume tabung
= π x r² x t
= 22/7 x 7 x 7 x 28
= 4.312 cm³