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

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

Answer:

Option C $452\ cm^{3}$

Step-by-step 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

$452.4\ cm^{3}=452\ cm^{3}$