The volume of composite figure is,
[tex]=1873+540=2413mm^{3}[/tex]
Volume of Cuboid:
The volume of composite figure is the sum of volume of upper cuboidal part and volume of lower cuboidal part.
The length , width and height of upper cuboidal part is 13, 12 and 12 mm.
Volume of upper part is,
[tex]=13*12*12=1873mm^{3}[/tex]
The length , width and height of lower cuboidal part is 15, 12 and 3 mm.
Volume of lower part is,
[tex]=15*12*3=540mm^{3}[/tex]
The volume of composite figure is,
[tex]=1873+540=2413mm^{3}[/tex]
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