How can we find the radius of cylinder

Step-by-step explanation:

Depending on what other value you can find determines how you can find the radius.

If you are also given the height or that the height is a multiple of the radius, i. e. h=kr where k is constant, then thats great.

Volume of a cylinder: V = π * r² * h,

Base surface area of a cylinder: A_b = 2 * π * r²,

Lateral surface area of a cylinder: A_l = 2 * π * r * h,

Total surface area of a cylinder: A = A_b + A_l,

Longest diagonal of a cylinder: d² = 4 * r² + h²,

Surface-area-to-volume ratio of a cylinder: SA:V = A / V = 2 * (r + h) / (r * h)