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The proportions of charcoal; saltpetre and sulphur in gun powder by weight; are respectively:
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Question:The proportions of charcoal; saltpetre and sulphur in gun powder by weight; are respectively:
1.15; 75; 10
2.75; 10; 15
3.10; 15; 75
4. 10; 75; 15.
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Answer:1
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