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Verified answer
Skala := 18cm : 12M
= 18cm : 1200cm
= 3:200
Panjang sebenarnya :
= Panjang pada model : Skala
= 30 cm : 3/200
= 30cm x 200/3
= 2000cm
= 20M
Lebar sebenarnya :
= Lebar pada model : Skala
= 27cm : 3/200
= 27cm x 200/3
= 1800cm
= 18M