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Π = 3,14
r(jari-jari alas) = 10 cm
Lias selimut tabung = 1,256 cm
tinggi tabung?
maka,
Luas selimut tabung = 2Πrt
1256 = 2×3,14×10×t
1256 = 62,8t
1256÷62,8 = t
20 = t
tinggi tabung = 20 cm