Answer:
10.9 liters
Explanation:
cubical tank size = 30 x 30 x 30
filled with 6 cm x 30 cm x 30 cm = 5400 cu.cm
then added 5500 cu.cm.
total volume on a cubical tank = 5400 cu.cm + 5500 cu.cm
total volume on a cubical tank = 10,900 cu.cm x 1 cu.cm/0.001 liters
total volume on a cubical tank = 10.9 liters