The calculated distance (air line) between Ipanema and Duque de Caxias is approximately 15 miles respectively 25 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 Ipanema and Duque de Caxias has been calculated here.
Air line (approximately)
25 kilometers
13 nautical miles