Volume Of Cylinders

Volume Of Cylinders

Open Ended

How do you find the area of a circle? What formula do you use?

 $V\ =\ \pi r^2h$  

• Plug in what you know...

•  $V\ =\ \left(3.14\right)\left(3^2\right)\left(6\right)$  

•  $V\ =\ 3.14\ \cdot\ 9\cdot6$  

•  $V\ =\ 56\ \cdot\ 3.14$  

•  $V\ =\ 175.8\ m^3$  

 $V\ =\ \pi r^2h$  

• Is the radius 10?

• Plug in what you know...

•  $314\ =\ \pi\left(5\right)^2h$  

•  $314\ =\ 3.14\cdot25\cdot h$  

•  $314\ =\ 78.5\ \cdot\ h$  

•  $\frac{314}{78.5}=\ \frac{78.5h}{78.5}$  

•  $4\ in=\ h$  

We need to find the volume of the empty space in the jar.

• Volume of entire jar - volume of the salsa

•  $V\ =\ \left(V\ jar\right)-\left(V\ Salsa\right)$  

•  $V\ =\ \left(\pi r^2h_1\right)-\left(\pi r^2h_2\right)$  

•  $V\ =\left(3.14\cdot5^2\cdot10\right)-\left(3.14\cdot5^2\cdot4\right)$  

•  $V\ =\ 785\ -\ 314$  

•  $v\ =\ 471\ cm^3$  

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