A cone has a total surface area of 100π cm² and a radius of 5 cm. What is its slant height?
Options
A
4 cm
B
5 cm
C
7 cm
D
15 cm
Answer & Analysis
Answer
D
Analysis
Question Analysis
This question involves working backward from surface area to find the slant height.
The main focus is on solving the cone surface area formula for a missing variable.
Key Concept Explanation
SA = πr² + πrl, where is the radius and
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