The cooking utensils are made up of aluminium and brass because they are good conductors of heat. These metal utensils are generally tinned from inside to prevent any reaction between such metal and the foodstuffs.For efficient cooking, those metals are used.
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Cooking utensils are made of aluminium and brass as they are good conductor of heat and heat is equal all over the utensils equally. They does not allow to escape heat easily.
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