Question

What is the formula of TSA and LSA of hollow cylinder

Answer 1

TSA of hallow cylinder is 2πr(h+r) sq. units

CSA of hallow cylinder is 2πrh sq. units

Hope this helps you friend
Thanks ✌️ ✌️

Answer 2

Hey here is your answer::
TSA of hollow cylinder =>
$2\pi(r1 + r2)(h + r1 - r2)$