First, identify the value or your variables.
Your r=2 and your h=5
So
Put those values into the volume formula given.
That would leave you with
V= 1/3(3.14)(2^2)(5)
Simplify by squaring the radius and you get
V=1/3(3.14)(4)(5)
You can then multiply across and your final answer rounded to the nearest tenth is 20.9units^3