Answer:
300 ft³
Explanation:
The easiest thing to do is to separate it into 3 cuboids. Then work out the volumes of each cuboid and add them together.
Volume of a cuboid = width x height x depth
The left cuboid has a width of 12 - 5 - 4 = 3 ft
From inspection, it has a height of 4 ft and a depth of 5ft.
So the volume of this is 3 x 4 x 5 = 60 ft³
The middle cuboid has a height of 6 + 2 = 8 ft
From inspection, it has a width of 5ft and a depth of 5ft
So the volume of this is 8 x 5 x 5 = 200 ft³
Finally, the right cuboid has a width of 4ft, a height of 2 ft and a depth of 5ft. So the volume is 4 x 2 x 5 = 40 ft³
Therefore, the total volume = 60 + 200 + 40 = 300 ft³