Question
PSLE
The mass of a box with 49 identical balls is 785 g. When 27 of the balls are thrown away, the mass of the box with the remaining balls is 515 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 785 g. When 27 of the balls are thrown away, the mass of the box with the remaining balls is 515 g. What is the mass of each ball?