The calculated distance (air line) between Sv. Trojica v Slov. Goricah and Grosuplje is approximately 72 miles respectively 116 kilometers.
By car or train, the actual journey to Grosuplje is certainly longer, as only the direct route (as the crow flies) between Sv. Trojica v Slov. Goricah and Grosuplje has been calculated here.
Air line (approximately)
116 kilometers
63 nautical miles