A cuboid wood with a square bottom is 5 meters long. Cut it into 4 sections and increase its surface area by 36 square meters. What's the volume of this cuboid wood?

A cuboid wood with a square bottom is 5 meters long. Cut it into 4 sections and increase its surface area by 36 square meters. What's the volume of this cuboid wood?

The volume of this cuboid is 30 cubic meters

Divide a cube with a surface area of 36 square meters into two cuboids, and then put the two cuboids together into a large cuboid with a large cuboid area

It is equivalent to 9 faces, i.e. 6 * 9 = 54

A cube, it is divided into two cuboids, the surface area increased by 36 square meters, what is the volume of the cube?
Please write down why you do it and write down the formula
Please write down why you do it and write down the formula
Please write down why you do it and write down the formula
There is no root. If you want to say "root", please make it clear what "root" is.

All two add 2 faces = 36 square meters
So one surface is 18 square meters
One is 18m long
So the volume is 54 root 2 cubic meters