The specific solutions are as follows:

First of all, the formula to be used in this question is: cuboid volume V=S (bottom area) *h (height), cone volume V= 1/3*S (bottom area) *h (height).

Knowing the above two formulas, we can use the relationship and meaning between the two formulas to solve the problem.

Secondly, since point E is the midpoint of CC 1, then EC =1/2 * CC1=1/2 * h, this step of equivalent substitution is the key to solve the problem. Next, continue to use the idea of equivalent substitution, SBCD= 1/2S (bottom area), and think about the next step after getting the above steps by equivalence.

Then v (cone) =1/3 * s (BCD) * h (EC1) is known, and then it is substituted into the formula obtained in the previous step, that is, v (cone) =1/3 * s (BCD) * h (EC 65438

Finally, it is known that s (bottom area) *h (height) =V (cuboid) = 120, then112 * s (bottom area) *h (height) =112.

The skill to solve this problem is to change the unknown quantity into the known quantity through equivalent substitution. Although the length and bottom area of each side are unknown, the volume of the cone can be judged by the total volume and the equivalent relationship between the area and the side length.

The sloppiness of this problem is that the cone volume is not multiplied by 1/3, which is a mistake that many people will make.