A rectangular parallelepiped with dimensions of 3m, 4m and 6m was cut into cubes with

A rectangular parallelepiped with dimensions of 3m, 4m and 6m was cut into cubes with an edge of 1dm and folded into one row. How long is the row?

Let’s find the volume of the parallelepiped:
V = a * b * c.
By the condition of the problem, a = 3 m, b = 4 m, c = 6 m.

V = 3 * 4 * 6 = 72 cubic meters.

Convert cubic meters to cubic decimeters

V = 72 * 1000 = 72000 dm cube.

When sawing a parallelepiped, we get 72000 cubes with an edge of 1 dm.
If we put them in one line, we get a row with a length of 72000 dm = 7200 m = 7.2 km.