Prosze o pomoc!;) Zamień jednostki. 3h12 min=         s 1400s=          h 2,4h=         s I jak to się oblicza?  

a)3h12min 3*60=180min 180+12=192min 192*60=11520s b)1400s 1400/60=23,33min 23,66/60=0,39h c)2,4h (60/10)*4=6*4=24min 2h24min 2*60=120min 120+24=144min 144*60=8640s

[latex]1h=3600s \\ wiec: \\ 3h 12s=3 cdot 3600s+12s=10812s \\\ 1s=frac{1}{3600}h \\ wiec: \\ 1400s=1400 cdot frac{1}{3600s}h=frac{14}{36}h=frac{7}{18}h\\\ 2,4h=2,4 cdot 3600s=8640s[/latex]