The calculated distance (air line) between Bochum-Hordel and Sevenum is approximately 49 miles respectively 79 kilometers.
By car or train, the actual journey to Sevenum is certainly longer, as only the direct route (as the crow flies) between Bochum-Hordel and Sevenum has been calculated here.
Air line (approximately)
79 kilometers
43 nautical miles