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3,6km=3600m
3600m:90m/s=40s
Odp.: c) 40 sekund
Zad 3.
c) 1,25dm³
Zad 4.
-2+18+42-10+12-16+5=49
49:7=7
Odp.: c)7
Zad 5.
d) 120g
Zad 6.
d) 10x+8x√2