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If the area of a ring is 147 cm and the radius of the bigger circle is 2 times the radius of the smaller circle, find the radii of both the circles. |
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Answer» r=3.39 & R=6.78Step-by-step explanation:R is the RADIUS of BIG circle, r is the smaller circle Area of RING = 147cm Area of circle =πr^2 147 = πr ^ 2 [147x7]/22=r^2 R=6.78 From the condition R= 2R 6.78/2= 3.39=r r=3.39 |
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