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)

a.81 cm3b)226 cm3c)452 cm3eliminated)1018 cm3

Answer 1

V=hpir^2
d/2=r
d=8,
8/2=d/2=4=r

v=hpir^2
v=9pi4^2
v=9pi16
v=144pi
aprox
v=452.3

answer is C

Answer 2

Option C
`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)`