The calculated distance (air line) between Sarpol-e Z̄ahāb and Mandalī is approximately 52 miles respectively 84 kilometers.
By car or train, the actual journey to Mandalī is certainly longer, as only the direct route (as the crow flies) between Sarpol-e Z̄ahāb and Mandalī has been calculated here.
Air line (approximately)
84 kilometers
45 nautical miles