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Jarak sebenarnya nya
=Jarak peta × Skala
=7 × 30
=210 km
cara cepat dgn perbandingan senilai
5 cm ----> 150 km
7 cm ----> z km
kalikan silang
5z=150×7
z=150×7/5
z=210 km
Jarak peta = 7 cm.
Jarak sebenarnya = 7 cm × 3.000.000 = 21.000.000 cm = 210 km.