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प्रश्न
State two advantages of coal as a source of power.
अति संक्षिप्त उत्तर
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उत्तर
- Coal is used to power machinery, trains, ships and dynamos.
- Coal is used to produce iron and steel.
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अध्याय 11: Conventional Sources of Energy - EXERCISES [पृष्ठ १५३]
