How to calculate the weight of iron For example, if you know that a steel has an outer circle of 50 and a length of 100, how can you find its weight?

How to calculate the weight of iron For example, if you know that a steel has an outer circle of 50 and a length of 100, how can you find its weight?

The conditions you give are incomplete. First, there is no unit of length; second, there is no specific gravity of iron
If the perimeter P = 50 mm and length L = 100 mm, the volume v = sectional area a * length L = pi / 4 * (P / PI) ^ 2 * l = P ^ 2 / (4 * PI) * l = 19894.4 mm ^ 3 = 19.89 cm ^ 3
In general, the specific gravity of iron is 7.85 g / cm ^ 3
Therefore, the weight of the iron is = 7.85 g / cm ^ 3 * 19.89 cm ^ 3 = 156.1 G