Question

please solve in note book​

Answer 1

Total Surface Area: Surface area (SA) or total surface area (TSA) of the cuboid

= Sum of all faces of the cuboid

= lb + lb + bh + bh + lh + lh

⇒ SA or TSA = 2 (lb+bh+hl) sq.units

i.e. SA or TSA =2 (Length x Breadth + Breadth x Height + Height x Length)

Lateral Surface: Area If out of the six faces of a cuboid, we leave the bottom and top faces and find the area of the four faces, then the area of these four faces is called the lateral surface area of the cuboid.

So, lateral surface area of a cuboid = 2(l + b)h

Diagonal of a Cuboid

Diagonal of a cuboid = √(l2 +b2 +h2