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1/2 bola = 2.22/7.7.7 = 308 cm2
tabung = 22/7.7 (7+2.20)
= 22.47 = 1.034 cm2
308 + 1034 = 1.342 cm2
luas permukaan
kerucut = 3,14.3,5.12,5 = 137,375 cm2
tabung = 3,14.3,5 (3,5+2.3,5)
= 10,99.10,5 = 115,395 cm2
137,375 + 115,395 = 252,77 cm2