Question
Quantitative Ability and Data Interpretation Question on Mensuration
A cone of radius 4 cm with a slant height of 12 cm was sliced horizontally, resulting into a smaller cone (upper portion) and a frustum (lower portion). If the ratio of the curved surface area of the upper smaller cone and the lower frustum is 1:2, what will be the slant height of the frustum?
A
12 – √3
B
12 – 2√3
C
12 – 3√3
D
12 – 4√3
E
None of the above
Answer
12 – 4√3
Explanation
Solution
The correct option is (D) : 12 – 4√3