The calculated distance (air line) between Bogor and Rengasdengklok is approximately 46 miles respectively 74 kilometers.
By car or train, the actual journey to Rengasdengklok is certainly longer, as only the direct route (as the crow flies) between Bogor and Rengasdengklok has been calculated here.
Air line (approximately)
74 kilometers
40 nautical miles