Let the number of steel and copper rods in the storeroom be ‘8k’ and ‘7k’, respectively Let the weight of one steel rod and one copper rod be ‘3y’ kg and ‘7y’ kg, respectively According to the question, 8k × 3y + 7k × 7y = 219 Or, 24ky + 49ky = 219 Or, 73ky = 219 Or, ky = (219/73) = 3 But since we do not have information regarding the exact number of rods in the room, we cannot determine the exact weight of one steel rod.
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