Find the value of radius for which the circumference and area of a circle are equal

Find the circumference and area of a circle of radius 8.4cm.

Find the circumference and area of a circle of radius 4.2cm.

Find the circumference and area of a circle of radius 8.4 cm.

Find the circumference and area of a circle of radius 4.2 cm.

Find the circumference and area of a circle of radius 10.5cm .

If the numerical value of the circumference and area of a circle is same, then the area is

Answer the following by a number or a word or a sentence : If the circumference and the area of a circle are numerically equal, find the diameter of the circle.

If the area of a circle is 64pi , which is the circumference of the circle?

Find the ratio of radius to circumference of the circle.