The calculated distance (air line) between Ganei Tikva and Bet Shemesh is approximately 24 miles respectively 38 kilometers.
By car or train, the actual journey to Bet Shemesh is certainly longer, as only the direct route (as the crow flies) between Ganei Tikva and Bet Shemesh has been calculated here.
Air line (approximately)
38 kilometers
21 nautical miles