The ratio between area of two circles is 9 : 25. What will be the ratio of their radius?
Answer & explanation
Correct answer: option 2
Ratio of Area = \(\pi \) (r1)2 : \(\pi \)(r2)2 = (r1)2 : (r2)2
⇒ (r1)2 : (r2)2 = 9 : 25
⇒ r1: r2= 3 : 5
Ratio of radius = 3 : 5