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Lp setengah selimut tabung + 2 x 1/2 luas lingkaran + Lp prisma:
1/2 x 2πrt + πr² + 2La + (Ka x t')
3,14 x 25 x 80 + 3,14 x 25² + 2 x 1/2 x 30 x 40 + (30+40+50) x 80
6280 + 1962,5 + 1200 + 9600
19042,5 cm²