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