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If the circle (x- a)^2+y^2 =25 intersect...

If the circle `(x- a)^2+y^2 =25` intersect the circle `x^2+(y -b)^2=16` in such a way that common chord is of maximum length, then value of `a^2 + b^2` is

A

9

B

12

C

15

D

25

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The correct Answer is:
A
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MCGROW HILL PUBLICATION-CIRCLES AND SYSTEMS OF CIRCLES -EXERCISE (LEVEL 1 ( SINGLE CORRECT ANSWER TYPE QUESTIONS ))
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