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Q.

C1  is a circle of radius 1 touching the x-axis and y-axis. C2 is another circle of radius greater than 1 and touching the axes as well as the circle C1 . Then, the radius of C2  is

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An Intiative by Sri Chaitanya

a

322

b

3+22

c

3+23

d

1

answer is B.

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Detailed Solution

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 Question Image
Or  25n2>4
From the diagram, sin45o=ABOA=rOC+CD+DA 
=r2+1+r
Or  2+1+r=2r
Or   r=2+121=3+22
 

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