Count the $C$ shape cubes with $5$ inches side for each cube and also find the volume of a cube.

The correct option is A $3625{in}^3$
Number of cubes $=29$

Side of each cube $=5$ in

Volume of a cube $=$ side $\times$ side $\times$ side or $s^3$

So, volume of one cube $=$ $5\times 5\times 5=125$ ${in}^3$

Volume of $29$ cubes $=$ $29\times 125=3625$ ${in}^3$