The calculated distance (air line) between South Tangerang and Rengasdengklok is approximately 41 miles respectively 66 kilometers.
By car or train, the actual journey to Rengasdengklok is certainly longer, as only the direct route (as the crow flies) between South Tangerang and Rengasdengklok has been calculated here.
Air line (approximately)
66 kilometers
35 nautical miles