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The circles having radii r1a n dr2 inter...

The circles having radii `r_1a n dr_2` intersect orthogonally. The length of their common chord is `(2r_1r_2)/(sqrt(r1 2+r1 2))` (b) `(sqrt(r1 2+r1 2))/(2r_1r_2)` `(r_1r_2)/(sqrt(r1 2+r1 2))` (d) `(sqrt(r1 2+r1 2))/(r_1r_2)`

A

`(2r_(1)r_(2))/(sqrt(r_(1)^(2)+r_(2)^(2)))`

B

`(r_(1)r_(2))/(sqrt(r_(1)^(2)+r_(2)^(2)))`

C

`(2r_(1)^(2)r_(2))/(sqrt(r_(1)^(2)+r_(2)^(2)))`

D

`(2r_(2)^(2)r_(1))/(sqrt(r_(1)^(2)+r_(2)^(2)))`

Text Solution

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The correct Answer is:
A
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