A) 3/2
B) 3/4
C) 1/10
D) 1/20
Correct Answer: B
Solution :
The diameter of the circle is perpendicular distance between the parallel lines (tangents) \[3x-4y+4=0\]and \[3x-4y-\frac{7}{2}=0\] and so it is equal to \[\frac{4}{\sqrt{9+16}}+\frac{7/2}{\sqrt{9+16}}=\frac{3}{2}\]. Hence radius is \[\frac{3}{4}\].You need to login to perform this action.
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