CBSE Class 9CBSE
Share
Notifications

View all notifications
Books Shortlist
Your shortlist is empty

Find the Total Surface Area of a Right Circular Cone with Radius 6 Cm and Height 8 Cm. - CBSE Class 9 - Mathematics

Login
Create free account


      Forgot password?

Question

Find the total surface area of a right circular cone with radius 6 cm and height 8 cm. 

Solution

WKT, Total surface area = `pirl+pir^2` 

Now l= `sqrth(^2+r^2)`            [by Pythagoras theorem] 

Here, given  

Radius=6cm and height =8cm 

⇒ length=`sqrt(6^2+8^2)` 

= 10cm 

∴ Total surface area= `pirl+pir^2`

=`(22/7xx6xx10)+ (22/7xx6xx6)` 

= `(1320/7)+792/7 =301.71cm^2` 

 

  Is there an error in this question or solution?

APPEARS IN

 RD Sharma Solution for Mathematics for Class 9 by R D Sharma (2018-19 Session) (2018 to Current)
Chapter 20: Surface Areas and Volume of A Right Circular Cone
Ex.20.10 | Q: 5 | Page no. 7
Solution Find the Total Surface Area of a Right Circular Cone with Radius 6 Cm and Height 8 Cm. Concept: Surface Area of a Right Circular Cone.
S
View in app×