The calculated distance (air line) between Sekondi-Takoradi and Mampong is approximately 150 miles respectively 241 kilometers.
By car or train, the actual journey to Mampong is certainly longer, as only the direct route (as the crow flies) between Sekondi-Takoradi and Mampong has been calculated here.
Air line (approximately)
241 kilometers
130 nautical miles