1. Convert the dimensions of the sheet to inches:
   • Panjang: 4 kaki = 48 inci
   • Lebar: 8 kaki = 96 inci
2. Convert the thickness to decimal form:
   • 3/16 inch = 0.1875 inci
3. Calculate the area of the sheet in square inches:
   • Area = Length x Width = 48 inches x 96 inches = 4,608 square inches
4. Calculate the volume of the sheet in cubic inches:
   • Volume = Area x Thickness = 4,608 square inches x 0.1875 inches = 864 inci padu
5. Convert the volume from cubic inches to cubic feet:
   • Kelantangan (cubic feet) = Volume (inci padu) / 1728 = 864 inci padu / 1728 = 0.5 cubic feet
6. Determine the density of aluminum. The density of aluminum is typically around 0.098 paun per inci padu.
7. Multiply the volume in cubic feet by the density to calculate the weight in pounds:
   • Berat badan (lbs) = Volume (cubic feet) x Density = 0.5 cubic feet x 0.098 lbs/in³ ≈ 0.049 lbs

Oleh itu, a 4×8 3/16 kepingan aluminium would weigh approximately 0.049 pon.