Published by:
CGP EDU Academic Team
Published on: August 12, 2026
The radius of sphere 
and
is
A
2
B
C
3
D
Text Solution
Verified by ExpertsThe correct answer is:
B
Equation of sphere is, 
Centre of sphere = (0, 1, 2) and radius of sphere = 4
Let centre of circle be 
The d.r’s of line joining from centre of sphere to the centre of circle is 
or 
But this line is normal at plane 
∴ ∴ 
Centre of circle lies on 
∴ ∴ 
So, centre of circle = (1, 3, 4)
Therefore, Radius of circle
.
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