The calculated distance (air line) between Nuwara Eliya and Anuradhapura is approximately 96 miles respectively 155 kilometers.
By car or train, the actual journey to Anuradhapura is certainly longer, as only the direct route (as the crow flies) between Nuwara Eliya and Anuradhapura has been calculated here.
Air line (approximately)
155 kilometers
83 nautical miles