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प्रश्न
How was Iron produced in olden days?
टिप्पणी लिखिए
उत्तर
In the olden days, iron ore was smelted in brick furnaces. Charcoal was used as fuel. The iron produced was not sturdy and strong. It had to be smelted again. Finally, coke (produced from coal) was used to produce iron. But this was a costly method.
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