Outer radius (R) = 3 cm, Inner radius (r) = 2 cm, Height (h) = 10 cm.
∴ Total surface area of the pipe = Total area of both the bases + Outer CSA + Inner CSA (CSA = Curves surface Area)
= 2π(R2 – r2) + 2πRh + 2πrh
= 2π(R + r) (R – r) + 2πh (R + r)
= 2π(R + r) (R – r + h) = 2π(3 + 2) (3 – 2 + 10) cm2
= 2π(5) (11) cm2 = 110 π cm2.