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4,5 - x
1*x=2000*4,5
x=9000 worków
9000 - x
2500 - 1
9000=2500x
x=3,6h
czas (h) 4,5 x
3,6h = 3h36min
Odp. Pakowanie towaru trwałoby wówczas 3 godziny i 36 minut.