CircleHard
Question
The plane x + 2y - z = 4 cuts the sphere x2 + y2 + z2 - x + z - 2 = 0 in a circle of radius
Options
A.3
B.1
C.2
D.√2
Solution
Perpendicular distance of centre 
from x + 2y - 2 = 4
radius
from x + 2y - 2 = 4 radius
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