Which highway is 840 km in length where the town Wandong can be found?
Wandong:  The town is about 50 km north of the state capital, Melbourne, on the Hume Highway. Hume Highway: The Hume Highway, inclusive of the sections now known as the Hume Freeway and Hume Motorway, is one of Australia's major inter-city national highways, running for 840 km between Melbourne in the southwest and Sydney in the northeast.
i don't know