Answer:
The diameter of circle is 30 unit.
The correct answer is obtion (c) 30 unit.
Step-by-step explanation:
Given :

To Find :
- Radius of circle
- Diameter of circle

Solution :
Finding the radius of circle by substituting the values in the formula :












Hence, the radius of circle is 15 unit.

Now, finding the diameter of circle by substituting the values in the formula :




Hence, the diameter of circle is 30 unit.
