A solid cylinder of radius 7cm is 10 cm long. Find its total surface area.
- \(70\pi cm^2\)
- \(189\pi cm^2\)
- \(210\pi cm^2\)
-
\(238\pi cm^2\)
The correct answer is: D
Explanation
S = \(2\pi r^2 + 2\pi rh\)
= \(2\pi r(r + h)\)
= \(2\pi (7) (7 + 10)\)
= \(238\pi cm^2\)