What is the weight of a steel plate 15 feet long, 4 feet wide, and 5/8 inches
Thick, if the steel weighs 475 lbs/ ft3 .
For the first convert all units to feet: 5/8 inches is 0.05208 feet.
Volume of the plate is V = length*width*thickness = 15*4*0.05208 = 3.1248 ft3.
Mass of the plate is m = V*density = 3.1248*475 = 14 84.28 lbs.
Lateral surface are of the steel plate is
2*length*thickness+2*width*thickness = 2*15*0.05208+2*4*0.05208 = 1.979 ft2.
Total surface area of the plate is
2*length*width+2*length*thickness+2*width*thickness = 2*15*4+2*15*0.05208+2*4*0.5208 = 121.979 ft2.
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