The calculated distance (air line) between Cimahi and Rengasdengklok is approximately 52 miles respectively 84 kilometers.
By car or train, the actual journey to Rengasdengklok is certainly longer, as only the direct route (as the crow flies) between Cimahi and Rengasdengklok has been calculated here.
Air line (approximately)
84 kilometers
45 nautical miles