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26. 3.14 x 30 x 30 : 6 = 471
27. 13^3 = 2.197
12^3 = 1728 2.197+ 1728 = 3925
26. 60derajat/360 x luas lingkaran
60/360 x (3,14 x 30 x 30)
60/360 x 2826
169560/360
471
27. vol kubus I = 13 x 13 x 13 = 2197
vol kubus II = 12 x 12 x 12 = 1728
total = 2197 + 1728
3925