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luas alas bawah = luas tutup tabung
luas selimut = keliling alas x tinggi tabung = 22 x 10 = 220cm^2
keliling alas = x diameter = 22/7 x diameter = 22 cm
diameter lingkaran alas = 7cm, artinya jari-jarinya 3,5 cm
luas alas = = 22/7 x = 38,5cm^2
sehingga luas permukaan tabung
38,5 + 38,5 + 220 = 297cm^2