Math Chapter Wise Arithmetic English MCQ Rajasthan TGT 2016 Q.The area of a circle is halved when its radius is decreased by 'n', then radius of circle is An 2 2 1 − unit Bn 2 1 − unit C2n 2 1 − unit Dn 2 2 1 + unit Show answer Correct answer: n 2 2 1 − unit