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t = 6 cm
alas = 9 cm
skala = 1 : 150
maka :
T sebenarnya = 6 x 125 = 750 cm = 7,5 m
alas sebenarnya = 9 x 150 cm = 1.350 cm = 13,5 m
jadi : L = als x t
= 7,5 x 13,5
= 101,25 m²
alas 9x150=1350
luasnya 900x1350
=1215000