Question

The diameter of a baseball is 7.5cm. What is the surface area of a baseball? What is the volume?

Answer 1

the surface area of a sphere is

`4\pi r^2`

and r=diameter/2

so r= 3.75

and

`surfacearea=4\cdot\pi\cdot3.75^2=176.71cm^2`

and the volume of a sphere is

`(4)/(3)\cdot\pi\cdot r^3`

so:

`\text{volume}=(4)/(3)\cdot\pi\cdot3.75^3=220.89cm^3`