If the circumference of two circles are in the ratio 3:1, then the ratio of their areas will be :

(a) 3:4
(b) 9:1
(c) 5:6
(d) 2:3

Anurag Mishra Professor Asked on 3rd February 2016 in Maths.
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    Answer:  (b) 9: 1 

    Anurag Mishra Professor Answered on 5th February 2016.
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