[tex]1)\\a = 4 \ cm, \ \ b = 10 \ cm, \ \ c = 2 \ cm\\\\V = a\times b\times c\\\\V = 4 \ cm\times 10 \ cm\times \ 2 \ cm = 80 \ cm^{3}[/tex]
[tex]2)\\a = 2 \ dm, \ \ b = 5 \ dm, \ \ c = 9 \ dm\\\\V = a\times b\times c\\\\V = 2 \ dm\times 5 \ dm\times 9 \ dm = 90 \ dm^{3}[/tex]
