Asked by kirtichawla94 | 28th Oct, 2009, 07:18: PM
Rin and Rout be the radii of inner and outer circle respectively.
πRout2 - πRin2 = 770
Rout2 - Rin2 = 770x7/22 = 245
Rin2 = Rout2 - 245 = 212 - 245 = 196.
Rin = 14
Answered by | 29th Oct, 2009, 12:16: AM
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