What is the radius (in cm) ofa circle whose area is $$2\frac{17}{30}$$ times the sum of the areas of two triangles whose sides are 20 cm, 21 cm and 29 cm, and 11 cm, 60 cm and 61 cm (take $$\pi=\frac{22}{7}$$).

A

21

B

14

C

17.5

D

24.5