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1km=1000m=100000cm
a)
100000 : 50 = 2000 kroków
b)
565km=56500000 cm
56500000 : 50 = 1130000 kroków
lub
565 * 2000 =1130000 kroków
Zad,11
39000000 : 312000=
39000 : 312 = 125 osób /km^2