The weight of coal with impurities extracted from two different mines are 31.34 kg and 12.05 kg. If the total weight of coal is 45.60 kg, what is the total weight of the impurities?

2.0 kg

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2.21 kg

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3.0 kg

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2.12 kg

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Solution

The correct option is B 2.21 kg
Total weight of coal = 45.60 kg

Weight of coal with impurities extracted from first mine = 31.34 kg

Weight of coal with impurities extracted from second mine = 12.05 kg

Total weight = 31.34
+ 12.05
---------
43.39
---------

Total weight of the impurities = Total weight of coal with impurites - Total weight of coal

Total weight of the impurities = 45.60
- 43.39
--------
2.21
---------

Hence, total weight of the impurites = 2.21 kg

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