The figure below shows an annular ring with outer and inner as b and a,…
GATE · 2020 · CS · General Aptitude
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]
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