Mathematics
NULL
Medium
Question
The curved surface of a sphere is 64π cm². Find its radius.
A
1 cm
B
2 cm
C
4 cm
✓ Official correct answer
D
3 cm
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A
1 cm
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B
2 cm
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C
4 cm
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D
3 cm
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Explanation
4πr² = 64π ⇒ r² = 16 ⇒ r = 4 cm.