Question
PSLE
The mass of a box with 49 identical balls is 972 g. When 27 of the balls are used, the mass of the box with the remaining balls is 486 g. What is the mass of each ball?
2 m

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PSLE
The mass of a box with 49 identical balls is 972 g. When 27 of the balls are used, the mass of the box with the remaining balls is 486 g. What is the mass of each ball?