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= 6cm : 10.2km
= 6cm : 1.020.000cm
= 1 : 170.000
10. 30 - 2 - x = 20-2-2
28 - x = 16
- x = 16 - 28
-x = -12
-1 . -x = -1 . -12
x = 12
skala = ukuran pada peta : ukuran sebenarnya
= 6 cm : 1.020.000 cm
= 1 : 170.000
10. Diket : lebar foto = 20 cm , tinggi foto = 30 cm , kiri kanan & atas = 2 cm , lebar karton = 20 + 2 + 2 = 24 cm , tinggi karton = ?
JAWAB :
lebar foto/lebar karton = tinggi foto/tinggi karton
20/24 = 30/?
Tinggi karton
= 24x30 / 20
= 36cm
Sisa bagian atas
= 36cm - ( 30cm + 2cm )
= 36cm - 32cm
= 4 cm
Tanda " / " berarti per yang ke bawah