100 x 25 = 2500
100x25 feet is 2500 square feet, which is 0.05739 acre. Just a bit over 1/20th of an acre.
To calculate the weight of a 100x25 mm mild steel (MS) box section, you need the volume and the density of mild steel. The density of mild steel is approximately 7850 kg/m³. The weight can be calculated using the formula: weight = volume × density. For precise weight, the wall thickness of the box section is also needed; however, a rough estimate for a standard hollow section can be obtained by calculating the volume of the material used.