What is the volume of this figure? 144 in³ 168 in³ 288 in³ I don't know. Three-dimensional figure that could be formed by placing two rectangular prisms together to form a sideways L shape where the longer part of the L is on the left and the shorter part of the L extends right from the top. The longer part of the L has a length of 2 inches, a width of 12 inches, and a height of 5 inches. The shorter part of the L extends to the right with a total length of 4 inches, a width of 12 inches, and a height of 1 inch.