The calculated distance (air line) between Dhaka and Char Bhadrāsan is approximately 30 miles respectively 48 kilometers.
By car or train, the actual journey to Char Bhadrāsan is certainly longer, as only the direct route (as the crow flies) between Dhaka and Char Bhadrāsan has been calculated here.
Air line (approximately)
48 kilometers
26 nautical miles