Question

The radius of a cone is 5cm and vertical height is 12m. Find the area of the curved surface.​

Answer 1

Answer:

Step-by-step explanation:

204.28cm  

2

.

Here,

r=5cm

h=12cm

Wknow,

l  

2

=r  

2

+h  

2

 

l=  

r  

2

+h  

2

 

​

 

l=  

(5)  

2

+(12)  

2

 

​

 

l=  

25+144

​

 

l=  

169

​

 

∴  l=13cm

⇒  Area of curved surface =πrl

                                             =  

7

22

​

×5×13

                                             =204.28cm  

2

 

Answer 2

Answer:

A≈1.89m²

r Radius

5

cm

h Height

12