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Aflati volumul unui cub cu muchia de :
a) 10 cm b) 2[tex] \frac{2}{3} [/tex] cm c) 4 , (6) cm


Răspuns :

a) [tex]V=l ^{3} =\ \textgreater \ V=10^{3} =1000cm^{3} [/tex]
b) [tex]2 \frac{2}{3} = \frac{8}{3} \\ V= (\frac{8}{3})^{3} = \frac{8^{3}}{3^{3}} = \frac{512}{27} cm^{3}[/tex]
c) [tex]4 \frac{6}{9} =4 \frac{2}{3} = \frac{14}{3} \\ V= (\frac{14}{3} )^{3}= \frac{14^{3}}{3^{3}} = \frac{2744}{27} [/tex][tex]cm^{3}[/tex]