⇒C>100 ........(1) Now point of intersection of x−2y=4 and 2x−y=5 is (2,−1), which lies inside the circle S. ∴S(2,−1)<0 ⇒(2)2+(−1)2−3(2)+
10
3
(−1)+
C
36
<0 ⇒4+1−6−
10
3
+
C
36
<0 C<156 ..........(2) From (1)&(2) 100<C<156 Ans.