Oblicz: 45s=45*1/3600h=3/4h=3/4*60 min=z góry dziękuje!
45s=45*1/3600h=5*1/400=5/400=1/80h
3/4h=3/4*60min=3*15=45min
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45s=45*1/3600h=5*1/400=5/400=1/80h
3/4h=3/4*60min=3*15=45min