Question
A container filled with 10 identical marbles weighs 1380 g. The same container when filled with 4 identical balls weighs 660 g. The mass of each marble is four times the mass of each ball. What is the mass of the container?
4 m

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A container filled with 10 identical marbles weighs 1380 g. The same container when filled with 4 identical balls weighs 660 g. The mass of each marble is four times the mass of each ball. What is the mass of the container?