Question
PSLE
The mass of a box with 40 identical balls is 894 g. When 19 of the balls are removed, the mass of the box with the remaining balls is 533 g. What is the mass of each ball?
2 m

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PSLE
The mass of a box with 40 identical balls is 894 g. When 19 of the balls are removed, the mass of the box with the remaining balls is 533 g. What is the mass of each ball?