r1 and r2(r2>r1) coalesce, the radius of curvature of common surface is
(a) r2-r1
(b) r2-r1/r1r2
(c) r1r2/ r2-r1
(d) r2 +r1
Ans. c
(10)
5/5 - (1 vote)
r1 and r2(r2>r1) coalesce, the radius of curvature of common surface is
(a) r2-r1
(b) r2-r1/r1r2
(c) r1r2/ r2-r1
(d) r2 +r1
Ans. c
(10)
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