question_answer

The radius of a circle which touches y-axis at (0,3) and cuts intercept of 8 units with x-axis, is                   [IIT 1972]

A)            3    

B)            2

C)            5    

D)            8

Correct Answer: C

Solution :

           Obviously from figure, Radius is \[r=\sqrt{{{4}^{2}}+{{3}^{2}}}=5\].