The total surface area of a cone whose radius is $\frac{r}{2}$ and slant height 2l is
(a) $2 π r (l + r)$
(b) $π r (l + \frac{r}{4})$
(c) $πr (l + r)$
(d) $2 π r l$

Question

The total surface area of a cone whose radius is dfrac-r-2- and slant height 2l is-pi 2r -l - r- pi r left -l - dfrac-r-4-right-pi r -l - r- 2pi rl

Toppr Admin · Accepted Answer

The total surface area of a cone whose radius is r2 and slant height 2l is:π2r(l+r)πr(l+r4)πr(l+r)2πrl