The calculated distance (air line) between Gursahāiganj and Bāngarmau is approximately 33 miles respectively 54 kilometers.
By car or train, the actual journey to Bāngarmau is certainly longer, as only the direct route (as the crow flies) between Gursahāiganj and Bāngarmau has been calculated here.
Air line (approximately)
54 kilometers
29 nautical miles