no 28 sama 29 beserta cara nya

28. alas segitiga = 40cm
tinggi segitiga = 17cm
tinggi prisma = 54cm

V. prisma = l.alas × T.prisma
½×a×t×T.prisma
½×40×17×54 = 18360cm³➡D

29. r = 35cm
t = 72cm

V. tabung = πr²t
22/7×35×35×72 = 277.200cm³➡A

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