[tex]Dane:\\a = 25 \ cm\\b = 2 \ dm = 20 \ cm\\c = 0,3 \ m = 30 \ cm\\V = a\times b\times c = 25 \ cm\times20 \ cm \times30 \ cm = 15 \ 000 \ cm^{3}\\m = 200 \ dag = 2000 \ g\\Szukane:\\d = ?\\\\Rozwiazanie\\\\d = \frac{m}{V}\\\\d = \frac{2000 \ g}{15000 \ cm^{3}} = 0,133\frac{g}{cm^{3}}\\\\0,133\frac{g}{cm^{3}} = 0,133\cdot\frac{0,001 \ kg}{0,000001 \ m^{3}} = 0,133\cdot1000\frac{kg}{m^{3}} = 133\frac{kg}{m^{3}}\\\\133\frac{kg}{m^{3}} = \frac{133 \ kg}{1000 \ dm^{3}} = 0,133\frac{kg}{dm^{3}}[/tex]
[tex]\boxed{d = 0,133\frac{g}{cm^{3}}=133\frac{kg}{m^{3}}=0,133\frac{kg}{dm^{3}}}[/tex]
