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4500 cm / 300 cm = 15 cm (b)
4. 15 cm : 45000 cm
1 : 3000 (a)
5. Karena berbentuk persegi, maka panjang sisi adalah √49 = 7.
Panjang sisi sebenarnya = 7 x 50 = 350
Luas sebenarnya = 350 x 350 = 122500