Surface area = 400 unit square
Surface area = 1100 unit square
Surface area = 1100 unit square
Surface area = 2400 unit square
How to determine the surface area
The first figure is a cuboid;
Surface area of a cuboid = 2lw+2lh+2hw
L = 9
W = 11
h = 4
Surface area = 2( 9 × 11) + 2(9 × 4) + 2( 4× 11)
Surface area = 2(99) + 2(36) + 2(44)
Surface area = 198 + 72 + 88
Surface area = 400 unit square
Surface area of a triangular prism = Area of top + area of base
Area of the top = 1/ 2 b × h
Area = 1/2 × 4 × 8
Area = 16 unit square
Area of base = length × width
Area = 4× 4
Area = 16 unit square
Surface area = 16 + 16
Surface area = 1100 unit square
Surface area of a cylinder = 2πrh + 2πr² = 2 ( 3. 412 × 7. 5 × 15) + 2 ( 3. 141× 7. 5 × 7.5)
Surface area = 706. 95 + 353. 48
Surface area = 1100 unit square
Surface area of a cone =πr(r+ √h² + r2)
Surface area = [tex]3. 142 * 15 ( 15 + \sqrt{10^2 +34^2 }[/tex]
Surface area = [tex]47. 13 * 50. 44[/tex]
Surface area = 2400 unit square
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