The calculated distance (air line) between Sredneuralsk and Chelyabinsk is approximately 132 miles respectively 213 kilometers.
By car or train, the actual journey to Chelyabinsk is certainly longer, as only the direct route (as the crow flies) between Sredneuralsk and Chelyabinsk has been calculated here.
Air line (approximately)
213 kilometers
115 nautical miles