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1 liter of water fills a volume of 1000 cubic cm and weighs 1kg.

40 x 20 x 30 = 24,000 cubic cm, so it requires 24 liters of water to fill, therefore weighs 24 kg.

Google works well for most conversions. Go to www.google.com and search for the things you want to convert from and to. E.g. in this case search for "40 x 30 x 20 cubic cm in liters", which will give you the number of liters.

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14y ago
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Q: What is the number of kilograms of water needed to fill an aquarium 40.0cmx20.0cmx30.0cm?
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