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GATE | GATE CS 2020 | Question 8
The figure below shows an annular ring with outer and inner as b and a, respectively. The annular space has been painted in the form of blue colour circles touching the outer and inner periphery of annular space. If maximum n number of circles can be painted, then the unpainted area available in annular space is _________ .
(A)
π[(b2−a2)−(n/4)(b−a)2]
(B)
π[(b2−a2)−n(b−a)2]
(C)
π[(b2−a2)+(n/4)(b−a)2]
(D)
π[(b2−a2)+n(b−a)2]
Answer
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