Solution
For this case we can use the following formula:
[tex]V=\frac{1}{3}\pi\cdot r^2\cdot h[/tex]
And we have that :
r= 8/2= 4in
h = 12 in
Replacing we got:
[tex]V=\frac{1}{3}\pi\cdot(4)^2\cdot12=201.06[/tex]
then the answer is :
V= 201.06
For the second case we can do this:
2x +35= 5x-22
35+22 = 5x-2x
57 = 3x
x= 57/3= 19
