The calculated distance (air line) between Char Bhadrāsan and Sonārgaon is approximately 34 miles respectively 55 kilometers.
By car or train, the actual journey to Sonārgaon is certainly longer, as only the direct route (as the crow flies) between Char Bhadrāsan and Sonārgaon has been calculated here.
Air line (approximately)
55 kilometers
30 nautical miles