# Thread: I really don't like word problems

1. ## I really don't like word problems

They always confuse me.

The volume of a right circular cylinder of a radius (r) and height (h) is given V=(pie)r^2h. If the radius is twice the height, the volume can be expressed as a function of h only. Use composition of functions to find the volume as a function of height and find the volume if the height is 6 inches. Round your answer to 2 decimal places.

Any help?

2. Originally Posted by NFG123
They always confuse me.

The volume of a right circular cylinder of a radius (r) and height (h) is given V=(pie)r^2h. If the radius is twice the height, the volume can be expressed as a function of h only. Use composition of functions to find the volume as a function of height and find the volume if the height is 6 inches. Round your answer to 2 decimal places.

$\textcolor{red}{r = 2h}$

$V = \pi \textcolor{red}{r^2} h$

$V = \pi \textcolor{red}{(2h)^2} h
$

finish up the problem with your calculator.

also ... the constant , $\pi$ , is spelled pi. "pie" is something to eat.

3. Originally Posted by skeeter

also ... the constant , $\pi$ , is spelled pi. "pie" is something to eat.
oops, I totally overlooked that, thanks for the help