The calculated distance (air line) between Rio Novo and Duque de Caxias is approximately 91 miles respectively 147 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 Rio Novo and Duque de Caxias has been calculated here.
Air line (approximately)
147 kilometers
79 nautical miles