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7 Ingots


Puzzle ID:#7758
Fun:*** (2.23)
Difficulty:*** (2.83)
Submitted By:hprulz***




If 7 ingots of iron weigh 112 tonnes, 4 ingots of cobalt weigh 104 tonnes and 3 ingots of aluminium weigh 105 tonnes, how heavy are 5 ingots of tin?

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