The calculated distance (air line) between Lenart v Slov. Goricah and Grosuplje is approximately 71 miles respectively 114 kilometers.
By car or train, the actual journey to Grosuplje is certainly longer, as only the direct route (as the crow flies) between Lenart v Slov. Goricah and Grosuplje has been calculated here.
Air line (approximately)
114 kilometers
61 nautical miles