The calculated distance (air line) between Navadwīp and Rāmchandrapur is approximately 36 miles respectively 58 kilometers.
By car or train, the actual journey to Rāmchandrapur is certainly longer, as only the direct route (as the crow flies) between Navadwīp and Rāmchandrapur has been calculated here.
Air line (approximately)
58 kilometers
31 nautical miles