Question
A box containing 40 folders had a mass of 4.77 kg. A box containing 25 files has a mass of 5.77 kg. The mass of each file was twice that of each folder. Find the mass of the empty box in grams.
4 m

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A box containing 40 folders had a mass of 4.77 kg. A box containing 25 files has a mass of 5.77 kg. The mass of each file was twice that of each folder. Find the mass of the empty box in grams.