Question

The area of the curved surface
S = \left\\{ (x, y, z) ∈ \R^3 : z^2 = (x − 1)^2 + (y − 2)^2 \right\\}
lying between the planes z = 2 and z = 3 is

• A. $4\pi\sqrt2$
• B. $5\pi\sqrt2$
• C. $9\pi$
• D. $9\pi\sqrt2$

Answer 1

Answer: (B)

$5\pi\sqrt2$

Answer 2

The correct option is (B) : $5\pi\sqrt2$.