[tex]1 \ dzien = 24 \ h\\1 \ h = 3600 \ s\\1 \ min = 60 \ s\\\\\\2 \ dni \ \ 12 \ h \ \ 54 \ min \ \ 6 \ s =2\times24\times3500 \ s + 12\times3600 \ s + 54\times 60 \ s + 6 \ s =\\\\=172 \ 800 \ s + 43 \ 200 \ s + 3 \ 240 \ s + 6 \ s = \underline{219 \ 246 \ s}[/tex]
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[tex]1 \ kg = 100 \ dag\\\\1 \ dag = 0,01 \ kg\\\\\\254 \ dag = 254\cdot0,01 \ kg = 2,54 kg[/tex]
