The calculated distance (air line) between Qarqūzah and Bani Walid is approximately 96 miles respectively 155 kilometers.
By car or train, the actual journey to Bani Walid is certainly longer, as only the direct route (as the crow flies) between Qarqūzah and Bani Walid has been calculated here.
Air line (approximately)
155 kilometers
83 nautical miles