Two ci rc l es of radii 4 cm and 9 c m respectively, touch each other externally at a point and a common tangent touches them at the points P and Q respectively. Then the area of a square with the side PQ is –
A.144 $cm^2$
B.194 $cm^2$
C.169 $cm^2$
D.9 $cm^2$



[ A ]    a
right
[ B ]    b
[ C ]    c
[ D ]    d
Answer : Option A
Explanation :

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