Question 77215

C = 2&#960r    

but r = 3x+2
and &#960 = 22/7(approx)

so 2&#960(3x+2)= 22

2 x22/7 x(3x+2) = 22
2(3x+2) = 22/22 x 7

6x + 4  = 7

6x = 3
 
x = 3/6 = 0.5 cm