What is the sum of the diameters of the two circles ?

There are two circles of radii r1 and r2 (r1<r2). The area of the bigger circle is 693/2 cm2. The difference of their circumferences is 22 cm. What is the sum of the diameters of the two circles?
(a) 17.5 cm
(b) 22 cm
(c) 28.5 cm
(d) 35 cm

Anurag Mishra Professor Asked on 12th January 2016 in Maths.
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    Answer: (d) 35 cm 

    Anurag Mishra Professor Answered on 12th January 2016.
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