Answer:
Option (d) is correct.
Radius of given equation is 18 units.
Step-by-step explanation:
Given : The equation of circle as
We have to find the radius of given circle.
Consider the given equation of circle
The standard equation of circle with center (h,k) and radius r is given as
Rewriting in standard form, we have,
Grouping x and y variables, we have,
Convert x terms to perfect square term by adding 49 both side, we have,
Simplify, we have,
Convert y terms to perfect square term by adding 25 both side, we have,
Simplify, we have,
Thus, standard form is
Thus, radius of given equation is 18 units.