Question

The diameter of a water tower tank is 10ft , and its height is 9ft . What is the volume of water that can be stored in the tank?
(Use the value3.14 for π , and round your answer to the nearest cubic foot. Be sure to include the correct unit in your answer.)

can you help me please

Answer 1

\[
\text{As you know, }A=\pi r^2\text{ gives the area of a circle of radius }r.\\
\text{Similarly, }V=\pi r^2h\text{ gives the volume of a cylinder of radius }r\\
\text{and height }h.\\\\
\text{We're given that...}\\
\ \ \ r=\frac{10\text{ ft}}2=5\text{ ft}\\
\ \ \ h=9\text{ ft}\\
\ \ \ \pi=3.14\\
\text{So, all we must do now is merely plug in.}\\
\ \ \ V=\pi r^2h\\
\ \ \ \ \ \ = 3.14\times5\text{ ft}\times9\text{ ft}\\
\ \ \ \ \ \ = 141.3\text{ ft}^3\\\
\ \ \ \ \ \simeq 141\text{ ft}^3
\]

Answer 2

thank you sooo much i understand it now =)