∴ Area of circle = πr^{2} =  22  × (28)^{2} = 2464 sq.cm 
7 
∴ Area of the hexagon = 

× side^{2} = 

× 28^{2} ≈ 2037  
2  2 
↙  33640  ↘  
14 years A  12 years B  
x  (33640 – x) 
⇒ x  (  1 +  5  )  4  = (33640 – x)  [  1+  5  ]  6 
100  100 
⇒ 

= 



⇒  x  =  (  21  ×  21  ) 
(33640 – x)  20  20 
x =  33640 × 441  = 40 × 441 = 17640/ 
841 