The calculated distance (air line) between Belford Roxo and Barra Mansa is approximately 52 miles respectively 83 kilometers.
By car or train, the actual journey to Barra Mansa is certainly longer, as only the direct route (as the crow flies) between Belford Roxo and Barra Mansa has been calculated here.
Air line (approximately)
83 kilometers
45 nautical miles