The calculated distance (air line) between Mendes and Duque de Caxias is approximately 32 miles respectively 52 kilometers.
By car or train, the actual journey to Duque de Caxias is certainly longer, as only the direct route (as the crow flies) between Mendes and Duque de Caxias has been calculated here.
Air line (approximately)
52 kilometers
28 nautical miles