Calculate the total surface area of a cone of height 12cm and base radius 5cm. [Take π = 22/7]
- 180\(\frac{5}{7}\)cm\(^2\)
- 240\(\frac{2}{7}\)cm\(^2\)
- 235\(\frac{5}{7}\)cm\(^2\)
-
282\(\frac{6}{7}\)cm\(^2\)
- 361\(\frac{3}{7}\)cm\(^2\)
The correct answer is: D
Explanation
πrl + πr2 = πr(l + r)
\(\frac{22}{7}\) x 5(13 + 5)
282\(\frac{6}{7}\)cm\(^2\)