Given
Your family has a circular swimming pool.
The radius of the pool is 9 feet and and its depth is 4 feet.
Find out the volume of the pool.
To proof
As depth is given in the question that means the shape of the swimming pool
is cylinder.
Formula
![Volume\ of\ cylinder = \pi r^(2)h](https://img.qammunity.org/2019/formulas/mathematics/high-school/km3en7kgriuja5vzchvaga9fzawkj4sf7v.png)
where r = radius
h = height
now
radius of the pool is 9 feet and and its depth is 4 feet.
put all the values in the above equation
we get
![= \pi* 9^(2)* 4](https://img.qammunity.org/2019/formulas/mathematics/high-school/tza44z6ov9zzcbkv4n5jn4vsbp7zzarads.png)
use 3.14 to approximate pi
![= 3.14* 9*9*4](https://img.qammunity.org/2019/formulas/mathematics/high-school/x39m4ceprdhjyktqrowrase2ielcgtm3xw.png)
we get
= 1017.4 ( approx )feet²
Hence proved