Question

Suppose a coffee cup has a diameter of 8 cm and a height of 9 cm. What is the volume of the cup? (to nearest whole number)

Answer 1

What I got, rounded to the nearest whole number, is 452 cm. for the volume.
Formula: pi*radius squared*height

Answer 2

`452\ cm^(3)`

Explanation:

we know that

the volume of a cylinder (coffe cup) is equal to

`V=\pi r^(2) h`

we have

`r=8/2=4\ cm` -----> the radius is half the diameter

`h=9\ cm`

substitute

`V=\pi (4^(2))(9)=452.4\ cm^(3)`

Round to the nearest whole number

`452.4\ cm^(3)=452\ cm^(3)`