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CBSE Class 10 Answered

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Asked by kirtichawla94 | 28 Oct, 2009, 07:18: PM
answered-by-expert Expert Answer

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

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Answered by | 29 Oct, 2009, 12:16: AM
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