Question

find the total surface area of cone if its height is 9cm and radius of the base is 12cm.​

Answer 1

★ Question ★

*find the total surface area of cone if its height is 9cm and radius of the base is 12cm.*

$\rule{300}2$

→ Given ★

◇ slant height ( length ) = 9cm

◇ Radius = 12cm

★ To find,

◇ Total surface area = ?

$\rule{300}2$

★ Answer ★

* T.S.A= $πr(l+r)$

$\rightarrow\frac{22}{7}×12(9+12) \\ \rightarrow \frac{22}{7}+12×21 \\ \rightarrow 22×12×3 \\ \rightarrow 792cm^{2}$

Answer 2

the above answer is right.....xd