SSC CGL – Combined Graduate Level Examination · પ્રશ્ન 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?
જવાબ બતાવો અને સમજૂતી
જવાબ: (B) 55.56%
સમજૂતી
(144 − 64)/144 = 55.56%.