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Lp= 2(Llingkaran) + Selimut tabung
= 2 + (tinggi x Keliling Lingkaran)
= 2(22/7 x 4,2cm x 4,2cm) + (20cm x 22/7 x 8,4cm)
= 110,88 cm2 + 528 cm2
= 638,88 cm2
2.22/7.4,2(4,2+20)
26,4 . 24,2
=638,88