Question

A cylindrical can of baked beans has a diameter of 8 cm and a height of 9 cm.

What is the exact volume of the can?



A.
72π cm³


B.
144π cm³


C.
648π cm³


D.
2304π cm³

Answer 1

Formula for volue of cylinder is area time height. Lets find area
A=
`\pi r^2`
diameter=2r
8=2r
r=4
Now substitute r to
`A= \pi r^2`
A=
`\pi 4^2= 16\pi`
Now we have formula
V=
`16 \pi *height=16 \pi *9=144 \pi` - its the result, so B