Home › UP Board Class 10 › Mathematics › Surface Areas and Volumes › The volume of a frustum of a cone with radii 6 c…
The volume of a frustum of a cone with radii 6 cm and 3 cm and height 4 cm is
A36 pi cu cm
B63 pi cu cm
C84 pi cu cm
D12 pi cu cm
Answer & Solution
Correct answer: C. 84 pi cu cm
1. V = (1/3) × pi × h × (R squared + r squared + R r).
2. = (1/3) × pi × 4 × (36 + 9 + 18) = (1/3) × pi × 4 × 63.
3. = 84 pi cu cm.
_Source: NCERT Class 10 Mathematics, Ch 12 "Surface Areas and Volumes", §12.4_
Related questions
Painting the outside of a toy needs to be worked out from its:Breaking a hard problem into solved smaller ones is the method:A cylindrical tube with a rounded end is a cylinder with a:Pouring a liquid into a container of another shape keeps its:Joining two solids at their flat faces hides those faces:Which solid is not among the basic ones met earlier?The word frustum comes from Latin, meaning a piece:The two circular ends of a frustum have radii that are: