Two similar cones have heights in the ratio . If the surface area of the smaller cone is square units, what is the surface area of the larger cone?
Options
A
square units
B
square units
C
square units
D
square units
Answer & Analysis
Answer
A
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 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 units be the area of the smaller cone.
We know that
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