Difference bw Area and Circumference of a Circle

The difference between Circumference of circle A and diameter is 60 cm. If Radius of Circle Bis 6 cm less than circle A then find area of Circle B?

find the area and circumference of a circle of diameter 91 cm

The sum of the radius and the circumference of a circle is 51 cm . The area of the circle is :

The area of circle is seven times the numerical value of its circumference. What is the circumference of the circle?

The difference between circumference and diameter of circle is 30cm, find the radius of circle.