First, we will calculate the area of the rectangle
[tex]A=l\times w[/tex]
l=4cm
w=5cm
[tex]A=4\times5=20\operatorname{cm}^2[/tex]
the volume is to multiply the are for the heighth
[tex]V=A\times h[/tex][tex]V=20\times12=240\operatorname{cm}^3[/tex]
the volume is 240cm^3
