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=22/7 X 7 X 7 X 14
=2.156 cm
luas alas = π r²
= 22/7 x 7²
= 22/7 x 49
= 154 cm²
kel alas = π d = 22/7 x 14 = 44 cm → kel alas = panjang persegi panjang.
luas peregi panjang= p x l
= 44 x 14
= 616 cm²
luas permukaan tabung = 2 . luas alas + luas persegi panjang
= 2 . 154 + 616
= 308 + 616
= 924 cm²
luas permukaan tabung adlh 924 cm²