1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

# Curved surface area of a cone is 308cm2 and its slant height is 14cm. Find total surface area of the cone.

A
462cm2
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
B
262cm2
No worries! We‘ve got your back. Try BYJU‘S free classes today!
C
432cm2
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
762cm2
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

## The correct option is A 462cm2Curved surface area of a cone =πrl where r is the radius of the cone and l is the slant height.Hence, CSA of this cone, =227×r×14=308 =>r=7cmHence, radius of the base of the cone is 7cm.Total surface area of a cone =πr(r+l) where r is the radius of the cone and l is the slant heght.Hence, TSA of this cone, =227×7×(7+14)=462cm2

Suggest Corrections
0
Join BYJU'S Learning Program
Related Videos
Curved Surface Area & Total Surface Area of Cone
MATHEMATICS
Watch in App
Join BYJU'S Learning Program