Question

the demenstion cone h=3 , r = 4 cm, themn what is the / =​

Answer 1

Answer:47.14 cm squ are

Step-by-step explanation:

We have, r=3cm and h=4cm.

Let l cm be the slant height of the cone,

then l  2  =r  2  +h  2   ⇒l  2  =3  2  +4 2  

⇒l=  

25

​

=5cm.

∴ Area of the curved surface =πrl

=(  

7

22

​

×3×5)cm  

2

=47.14cm  

2

.