SSC CGL – Combined Graduate Level Examination · ప్రశ్న 71
An annular (ring-shaped) disc has outer and inner radii of 12 cm and 8 cm. What percentage of the full circle is this ring?
సమాధానం చూపించు & వివరణ
సమాధానం: (B) 55.56%
వివరణ
(144 − 64)/144 = 55.56%.