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To find the weight of the rod, take its volume ( pi * radius2 * length for a cylindrical rod, make sure height and radius are the same unit) and multiply by the substance's density. In this case, assuming the diameter is 20 mm, 3.14 * 102 (the radius) * 1000 (1 meter = 1,000 mm) = 314,000 cubic centimeters. Steel's density is around 7.85 grams / cm3, so multiplying the two yields 2464900 grams or 2,464.900 kilograms (2,460 with significant digits depending on convention).

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Q: 20 mm steel rod one meter weight?
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