A roll of 25 m wire weighs 5 kg. How much does a 75 m roll weigh? Let's think first. Chain of thought:
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We know that the 75 m roll is three times bigger than the 25 m roll because 75 m / 25 m = 3. This means the 75 m roll weighs 3 times more than the 25 m roll: 5 kg * 3 = 15 Kg.
Therefore, the answer is 15.
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