The total surface area of a cone whose radius is and slant height 2 l is :
A. 2πr(l + r)
B. πr(l + \(\frac{r}{4}\))
C. πr(l + r)
D. 2πrl
Answer:B
The total surface area of a cone whose radius is and slant height 2 l is :
A. 2πr(l + r) B. πr(l + \(\frac{r}{4}\)) C. πr(l + r) D. 2πrl