find the cost of printing All Around The outer surface of a box with lead 100 cm long ,80 cm wide and 60 cm height at rupees 2 per 40 sq.cm
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Hence, cost of painting outer surface of box is Rs. 270.
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Iron is extracted from iron ore in a huge container called a blast furnace. Iron ores such as haematite contain iron(III) oxide, Fe2O3. The oxygen must be removed from the iron(III) oxide in order to leave the iron behind. Reactions in which oxygen is removed are called reduction reactions.
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