Mathematics
NULL
Medium
Question
A metallic sphere of radius 12 cm is melted and drawn into a wire of cross-section radius 16 cm. What is the length of the wire?
A
45 cm
B
18 cm
C
90 cm
D
None of these
✓ Official correct answer
Community credibility
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A
45 cm
No member explanations yet for this option.
B
18 cm
No member explanations yet for this option.
C
90 cm
No member explanations yet for this option.
D
None of these
No member explanations yet for this option.
Explanation
(4/3)π×12³ = π×16²×L ⇒ L = 9 cm, which is not in A–C. So None of these.