Q: What the surface area of 5 x 5 x 5?

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Surface area of a rectangular prism = 2 x (length x width + width x height + height x length → surface area = 2 x (24 in x 4 in + 4 in x 5 in + 5 in x 24 in) = 472 sq in.

184

Surface area = 2*(8*5 + 5*2.5 + 2.5*8) = 2*(40 + 12.5 + 20) = 2*72.5 = 145 square units.

2*pi*r*h+2*pi*r2=2*pi*5*8+2*pi*52 = 130pi Which is approx 408.40704...... The surface area of each of the two ends is pir2. The surface area of the curved surface is 2pirh. pi = 3.1416 r = 5 h = 8 Plug the values into the formulas. Each end surface area = 3.1416 X 52 = 78.54 Area of both of the two ends combined = 78.54 X 2 = 157.08 Curved surface area = 2 X 3.1416 X 5 X 8 = 251.328 Add the ends surface areas and curved surface area 157.08 + 251.328 = 408 rounded to the nearest whole number.

You can't have a cube with different dimensions, every side has the same measurement or it's not a cube. The surface area of your "object" is 2 x ((8 x 5) + (8 x 3) + (5 x 3)).

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Surface area of a rectangular prism = 2 x (length x width + width x height + height x length → surface area = 2 x (24 in x 4 in + 4 in x 5 in + 5 in x 24 in) = 472 sq in.

184

Surface area = 2*(8*5 + 5*2.5 + 2.5*8) = 2*(40 + 12.5 + 20) = 2*72.5 = 145 square units.

2*pi*r*h+2*pi*r2=2*pi*5*8+2*pi*52 = 130pi Which is approx 408.40704...... The surface area of each of the two ends is pir2. The surface area of the curved surface is 2pirh. pi = 3.1416 r = 5 h = 8 Plug the values into the formulas. Each end surface area = 3.1416 X 52 = 78.54 Area of both of the two ends combined = 78.54 X 2 = 157.08 Curved surface area = 2 X 3.1416 X 5 X 8 = 251.328 Add the ends surface areas and curved surface area 157.08 + 251.328 = 408 rounded to the nearest whole number.

You can't have a cube with different dimensions, every side has the same measurement or it's not a cube. The surface area of your "object" is 2 x ((8 x 5) + (8 x 3) + (5 x 3)).

Total surface area = 439.6 square units Area of top and bottom = 2 x pi x 5 x 5 = 50pi = 50 x 3.1415 = 157.075 square units Therefore the area of the vertical surface is 439.6 - 157.075 = 282.53 square units and this must equal 2 x pi x 5 x h where h is the height. Hence 282.53 = 10 x pi x h 282.53 = 31.415h h = 282.53 / 31.415 = 8.99 linear units

This is a cuboid so it has six sides. The surface area is the sum of the areas of the sides. Opposite sides are the same. So we have: 2 sides of area 8 x 9 centimetres squared 2 sides of area 8 x 5 centimetres squared 2 sides of area 9 x 5 centimetres squared That's a total of 314 centimetres squared.

100 x pi m2

surface area of a rectangular prism = 2(l x h) + 2(w x h) + 2(l x w) = 2(6 x 2) + 2(5 x 2) + 2(6 x 5) = 104

Length x Width x Height = surface area

The surface area is the total area of all the faces. For a cuboid, all these faces will be rectangular. Example: Find the surface area of a 2 x 4 x 5 cm cuboid. The area of the faces will be: 2 x 4 = 8 cm2 2 x 5 = 10 cm2 4 x 5 =20 cm2 Adding these up give an area of 38 cm2. However we now need to multiply our answer by 2 as there are exactly two of each face. So our final answer is 38 x 2 = 76 cm2.

Area of one face (one of the squares), squared. If the side is x the area of the surface is x times x times 6.