The calculated distance (air line) between Beau Bassin-Rose Hill and Roches Noire is approximately 18 miles respectively 29 kilometers.
By car or train, the actual journey to Roches Noire is certainly longer, as only the direct route (as the crow flies) between Beau Bassin-Rose Hill and Roches Noire has been calculated here.
Air line (approximately)
29 kilometers
16 nautical miles