The calculated distance (air line) between Sarpol-e Z̄ahāb and Mehrān is approximately 94 miles respectively 151 kilometers.
By car or train, the actual journey to Mehrān is certainly longer, as only the direct route (as the crow flies) between Sarpol-e Z̄ahāb and Mehrān has been calculated here.
Air line (approximately)
151 kilometers
82 nautical miles