The calculated distance (air line) between Holzwickede and Bochum-Hordel is approximately 20 miles respectively 32 kilometers.
By car or train, the actual journey to Bochum-Hordel is certainly longer, as only the direct route (as the crow flies) between Holzwickede and Bochum-Hordel has been calculated here.
Air line (approximately)
32 kilometers
17 nautical miles