The calculated distance (air line) between Vassouras and Duque de Caxias is approximately 35 miles respectively 56 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 Vassouras and Duque de Caxias has been calculated here.
Air line (approximately)
56 kilometers
30 nautical miles