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l.lemari = 60 cm
t,lemari = 72 cm
skala = p.model : p.lemari
= 12 cm : 96 cm
= 1 : 8
a) lebar model = 1/8 x 60 cm
= 7,5 cm
tinggi model = 1/8 x 72 cm
= 9 cm
b) L.lemari = 2 (p.l + p .t + l .t)
= 2 (96 . 60 + 96 .72 + 60 . 72)
= 2 (5760 + 6912 + 4320)
= 2 (16.992)
= 33984 cm²
L.model = 2 (12 .7,5 + 12 . 9 + 7,5 . 9)
= 2 (90 + 108 + 67,5)
= 2 (265,5)
= 531 cm²
c) v.lemari = 96 x 60 x 72
= 414,720 cm³
v.model = 12 x 7,5 x 9
= 810 cm³