Answer:
Correct choice is A
Step-by-step explanation:
The volume of the cylinder can be calculated using formula
[tex]V=\pi r^2 h,[/tex]
where r is the base circle radius and h is the height of the cylinder.
In your case, [tex]V=86.21\ ft^3,\ \ \ r=2.8\ ft,[/tex]
then
[tex]86.21=\pi\cdot (2.8)^2\cdot h,\\ \\h=\dfrac{86.21}{7.84\pi}\approx \dfrac{86.21}{7.84\cdot 3.14}\approx 3.5\ ft.[/tex]
