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JS= 80KM = 8.000.000CM
Skala = Jarak sebenarnya ÷ jarak pada peta
= 8.000.000 ÷ 2
= 1 : 4.000.000
19. p/7 = 21/49
1.( 21/49 diperkecil jadi 3/7 )
2. dikali silang jadi 21 = 7p
p = 21/7
p = 3