Answer: 7 cm
Explanation:
In the Map,
The distance of Australia from Sydney = 22 cm,
But, the actual distance of Australia from Sydney = 880 km,
Thus, In the map the scale is,
880 km = 22 cm


Since, the actual Canberra from Sydney in the map = 286 km
Thus, the distance of Canberra from Sydney in the map = 7 cm (approx)