Answer
The atomic radius a tungsten atom in this environment is $1.37$ angstrom.
Work Step by Step
This exercise mentions the distance between W atoms in tungsten metal is $2.74$ angstrom.
Therefore, we can deduce the atomic radius of tungsten as half the distance between W atoms in tungsten metal, according to definition.
So, the atomic radius a tungsten atom in this environment is $\frac{2.74}{2}=1.37$ (angstrom).