Question

how can we find the total surface area of a cone? explain in brief.​

Answer 1

Let's find

$\\ \rm\rightarrowtail TSA=LSA+Area\:of\:base$

• Base is a circle
• LSA=πrl

$\\ \rm\rightarrowtail TSA=\pi rl+\pi r^2$

$\\ \rm\rightarrowtail TSA=\pi r(l+r)$