Question

Find actual surface area of a cuboids of length 80cm, breadth 40cm,height 20cm.​

Answer 1

Answer:

Length=80cm

Breadth=40cm

Height =20cm

$area\: of \: a \: cuboid \: is \: 2(lb + lh + bh)$

2(80×40+80×20+20×40)

2(3600+1600+800)

2(6000)

12000cm³

I hope this would be helpful to you

Answer 2

Given :

• Length of the cuboid = 80 cm

• Breadth of the cuboid = 40 cm

• Height of the cuboid = 20 cm

To find :

• Surface area of the cuboid

Knowledge Required :

Formula to calculate surface area of cuboid :-

Surface area of cuboid = 2(lb + bh + hl)

where,

• l denotes the length of the cuboid
• b denotes the breadth of the cuboid
• h denotes the height of the cuboid

Solution :

Substituting the given values in the formula of surface area of cuboid :-

⟶ Surface area = 2(80 × 40 + 40 × 20 + 20 × 80)

⟶ Surface area = 2(3200 + 800 + 1600)

⟶ Surface area = 2(5600)

⟶ Surface area = 11,200

Therefore, the surface area of cuboid = 11,200 cm²

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Some related formulae :-

• Volume of cuboid = length × breadth × height
• Perimeter of cuboid = 4 (length + breadth + height)
• Total surface area of cube = 6 × side²
• Volume of cube = side³
• Perimeter of cube = 12 × side