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The ratio between area of two circles is 81 : 64. What will be the ratio of their radius? |
11 : 8 9 : 7 9 : 11 9 : 8 |
9 : 8 |
Ratio of Area = \(\pi \) (r1)2 : \(\pi \)(r2)2 = (r1)2 : (r2)2 ⇒ (r1)2 : (r2)2 = 81 : 64 ⇒ r1: r2= 9 : 8 Ratio of radius = 9 : 8 |
