What is the formula of solid surface area?

Answer 1

There are 2 types of surface areas;

1. Total Surface Area(TSA) which gives the complete surface area of the solid

2. Lateral/Curved Surface Area(LSA/CSA) which gives the surface area of the solid excluding the top and base areas. (eg, area of 4 walls of a room or area of the canvas required for a conical tent)

For a Cube with a side a:

LSA: 4x(square of a side) or 4a2

TSA: 6a2

For a cuboid with length l,breadth b, height h:

LSA: 2h(l+b)

TSA: 2(lb+bh+hl)

For a cylinder with radius of base r and heigth h:

LSA: 2Ï€rh

TSA: πr2h

For a cone with radius r, height h, slant height l:

LSA: πrl

TSA: πr(l+r)

For a sphere with radius r:

LSA=TSA=4Ï€r2

For a hemisphere with radius r:

LSA: 2Ï€r2

TSA: 3Ï€r2

Sorry, I dont know any more than this!!