The calculated distance (air line) between Bhandārdaha and Kāmārhāti is approximately 12 miles respectively 20 kilometers.
By car or train, the actual journey to Kāmārhāti is certainly longer, as only the direct route (as the crow flies) between Bhandārdaha and Kāmārhāti has been calculated here.
Air line (approximately)
20 kilometers
11 nautical miles