Five identical cubes, each of edge 5 cm, are placed adjacent to each other.

We have,

Length of the resulting cuboid, $l=5 \times 5=25 \mathrm{~cm}$,

Breadth of the resulting cuboid, $b=5 \mathrm{~cm}$ and

Height of the resulting cuboid, $h=5 \mathrm{~cm}$

Now,

Volume of the resulting cuboid $=l b h$

$=25 \times 5 \times 5$

$=625 \mathrm{~cm}^{3}$

So, the volume of the resulting cuboid is 625 cm3.