1. Convert the dimensions of the sheet to inches:
   • Length: 4 футы = 48 дюймы
   • Width: 8 футы = 96 дюймы
2. Convert the thickness to decimal form:
   • 3/16 inch = 0.1875 дюймы
3. Calculate the area of the sheet in square inches:
   • Площадь = длина х ширина = 48 inches x 96 inches = 4,608 square inches
4. Calculate the volume of the sheet in cubic inches:
   • Объем = Площадь х Толщина = 4,608 square inches x 0.1875 inches = 864 cubic inches
5. Convert the volume from cubic inches to cubic feet:
   • Volume (cubic feet) = Volume (cubic inches) / 1728 = 864 cubic inches / 1728 = 0.5 cubic feet
6. Determine the density of aluminum. The density of aluminum is typically around 0.098 фунтов на кубический дюйм.
7. Multiply the volume in cubic feet by the density to calculate the weight in pounds:
   • Weight (фунты) = Volume (cubic feet) x Density = 0.5 cubic feet x 0.098 lbs/in³ ≈ 0.049 фунты

Поэтому, 4×8 3/16 алюминиевый лист would weigh approximately 0.049 фунтов стерлингов.