If the surface area of a sphere is 1600π cm², what is the radius of the sphere?
Options
A
5 cm
B
10 cm
C
20 cm
D
25 cm
Answer & Analysis
Answer
C
Analysis
Question Analysis
This is a reverse problem—you’re given the surface area and must work backwards to find the radius.
The main focus is solving an equation using the surface area formula.
Key Concept Explanation
The formula for the surface area of a sphere is .
Given , we can solve for .
Step-by-step Solution
1. Given:
2. Use the formula:
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