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

What is the formula for the lateral surface area of the given frustum: Where, R1 = radius of the base L = length of lateral side of the bigger cone of which the frustum is a part R2 = radius of the top surface l = length of lateral height of cone - lateral height the frustum (s)

A
π(R1LR2l)
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
B
πR21hπR2l
No worries! We‘ve got your back. Try BYJU‘S free classes today!
C
π(R21hR22l)
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
None of these
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

The correct option is A π(R1L−R2l)Lateral surface area of the bigger cone of which the frustum is a part =πR1L Lateral surface area of the cone which is removed from the bigger cone =πR2Lcone Now, Lcone=Slant height of the bigger cone−Slant height of the frustum ⇒Lcone=L−s Lateral surface area of the cone which is removed from the bigger cone =πR2(L−s) =πR2l ∴ Lateral surface area of the frustum = Lateral surface area of the bigger cone of which the frustum is a part - Lateral surface area of the cone which is removed from the bigger cone =πR1L−πR2l The lateral surface area of frustum =π(R1L−R2l)

Suggest Corrections
4
Join BYJU'S Learning Program
Related Videos
Frustum of a Cone
MATHEMATICS
Watch in App
Explore more
Join BYJU'S Learning Program