Question

5. Formula used to find the total surface area of a cone of radius (r), height (h) and
slant height (1) is
A) CSA = irl
πF2h
B) CSA = 27t(r +1) C) CSA = 27Tr(r + h) D) CSA =
3​

Answer 1

Step-by-step explanation:

Total Surface area of a cone = πrl + πr^2

Answer 2

Answer :-

TSA if cone = $\pi r(r+l)$

$\sf \leadsto \dfrac{22}{7}\times r (r+1)$

$\sf \leadsto \dfrac{22}{7}\times {r}^{2}+r$

$\sf \leadsto \dfrac{22 {r}^{2}}{7} +r$

$\sf \leadsto \dfrac{22 {r}^{2} +7r}{7}$