$$ \text { In relation to metal casting defects, match the following } $$

$$ \text { Defect } $$		$$ \text { Description } $$
P.	Dross	1.	Shallow blow found on a flat casting surface
Q.	Scab	2.	Lighter impurities appearing on the top surface of a casting
R.	Scar	3.	A rough, thin layer of metal, protruding above the casting surface, on top of a thin layer of sand

A liquid metal is poured in a mold cavity of size $200 \mathrm{~mm} \times 200 \mathrm{~mm} \times 200 \mathrm{~mm}$. The cooling is uniform in all directions with NO additional compensation for shrinkage. Considering the volumetric shrinkage during solidification and solid contraction as $7 \%$ and $8 \%$, respectively, the length of the cube edge after cooling down to the room temperature is ___________ mm (rounded off to 1 decimal place).