The calculated distance (air line) between Rānīr Bāzār and Khowai is approximately 22 miles respectively 36 kilometers.
By car or train, the actual journey to Khowai is certainly longer, as only the direct route (as the crow flies) between Rānīr Bāzār and Khowai has been calculated here.
Air line (approximately)
36 kilometers
20 nautical miles