Question

write the formula of area and volume of different also find out the variable​

Answer 1

If you spin a circle into three dimensions, a sphere is formed. A sphere is a shape where the distance from the center to the edge is the same in all directions. This distance is called the radius ( r ).

Then volume of sphere=34πr3

And area of sphere =4πr2

So r is the variable other is constants

A cone is a pyramid with a circular base of radius ( r ) and the side length ( s ) is the length of the side.

s=r2+h2

The surface area is the sum of the area of the base and area of the side.

Area of base: πr2

Area of side: πrs

Surface Area = πr2+πrs

Volume = 31πr2

rectangular surface area =2(lh)+2(lw)+2(wh)

And volume =l×h×w

where

l = length

h = height

w = width

A prism can be described as a stack of shapes. The figure shows a prism of triangles stacked d thick, but any shape could be used.

Surface area = 2A + Pd

where A = area of the base shape P = perimeter of base shaped = height of prism

Volume = Ad

A cylinder is a prism with a circular base.

Surface Area = 2πr2+2πrh

Volume = πr2h