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UPSC CDS I 2025 Mathematics Paper

Question Numbers: 59-60
A pot is made from a hollow sphere of inner radius 20 cm by cutting its upper portion horizontally. The height of the pot is 30 cm.

Question : 60

Total: 100

What is the angle made by the line joining the centre of the sphere and any point on the rim of the circular opening with a vertical line passing through the centre?

$π \/ 3$
$π \/ 4$
$π \/ 6$
$π \/ 12$

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