Apologies for the oversight. To find the volume of the desk, you first calculate the volume of the large rectangular cuboid using the dimensions 40in, 24in, and 18in:
Volume = Length x Width x Height
Volume = 40in x 24in x 18in
Volume = 17,280 cubic inches
Next, you subtract the volumes of the two smaller rectangular cuboids inside the desk. Each smaller cuboid has dimensions 10in, 10in, and 12in:
Volume of each smaller cuboid = 10in x 10in x 12in
Volume of each smaller cuboid = 1,200 cubic inches
Since there are two smaller cuboids, the total volume subtracted would be 2 x 1,200 cubic inches = 2,400 cubic inches.
Finally, you subtract the total volume of the two smaller cuboids from the total volume of the large cuboid to get the volume of the desk:
17,280 cubic inches - 2,400 cubic inches = 14,880 cubic inches
Therefore, the correct volume of the desk is 14,880 in^3.