What is the total surface area of a cylinder having a radius of 14 cm and a height of 21 cm?
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → 3080 cm2
The total surface area of a closed cylinder is its curved surface \(2\pi rh\) plus its two circular ends \(2\pi r^2\), that is, \(2\pi r(r+h)\).
\(r+h=14+21=35\) cm
TSA \(=2\times\displaystyle\frac{22}{7}\times14\times35=88\times35=3080\) cm2