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13.kakak:kakek2. : 7
kakak=22:2=11
kakek=7 dikali 11=77 tahun
selisih=77-22=55tahun
14.7,5:1/1.500.000=112.500.000cm=1.125km
Kakak : Kakek = 2 : 7
Kakek => 7/2 × 22 = 77 tahun
Selisih => 77 - 22 = 55 tahun ( C )
14)
J. s = J. p : s
J. s = 75/10 : 1/1.500.000
J. s = 75/10 × 1.500.000
J. s = 11.250.000 cm
J. s = 112,5 km ( C )