Two similar cones have radii in the ratio of 2 : 3. If the surface area of the smaller cone is 16 square meters, what is the surface area of the larger cone?
Options
A
27 square meters
B
36 square meters
C
48 square meters
D
54 square meters
Answer & Analysis
Answer
B
Analysis
Question Analysis
This question is about working backwards from the ratio of areas of two similar cones (derived from the scale factor) to find the area of the larger cone.
The main focus is on the relationship between the scale factor and the ratio of areas.
Key Concept Explanation
The surface area ratio of two similar 3D objects is the square of the ratio of their corresponding linear dimensions. , we can use this formula to solve for the unknown area when the other values are provided.
Step - by - Step Solution
Let the scale factor be and , and let be the area of the larger cone and square meters be the area of the smaller cone.
We know that , then
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