This is the concept of volumes of solid figures; volume=length*width*height the dimensions of our figure is: length=15 1/2 in=31/2 in width=10 1/4 in=41/4 in height= 12 in thus the volume will be: volume=(31/2*41/4*12) volume=1906 1/2 in^3 the answer is 1906 1/2 in^3