If the wave impedance of a medium is 200 Ω, then what is the relative permittivity of that medium?

If the wave impedance of a medium is 200 Ω, then what is the relative permittivity of that medium? Correct Answer 1.885

The wave impedance is given by the expression /√∈. is the intrinsic impedance of the medium substituting the given values in the above expression, the relative permittivity is 1.885.
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