1. What is the circumference of a circle whose diameter is 3.5 cm?

2. What is the circumference of a circle whose diameter is 6.3 m?

3. What is the circumference of a circle whose diameter is 0.14 m?

4. What is the circumference of a circle whose radius is 56 cm?

5. What is the circumference of a circle whose radius is 7.7 cm?

6. What is the circumference of a circle whose radius is 0.28 m?

7. What are the radius and diameter of a circle whose circumference is 198 cm?

8. What are the radius and diameter of a circle whose circumference is 616 cm?

9. What are the radius and diameter of a circle whose circumference is 72.6 m?

10. What is the area of a circle whose radius is 28 cm?

11. What is the area of a circle whose radius is 5.6 m?

12. What is the area of a circle whose radius is 7.7 m?

13. What is the area of a circle whose radius is 6.3 m?

14. What is the area of a circle whose radius is 35 cm?

15. What is the diameter of a circle whose area is 1386 sq cm?

16. What is the diameter of a circle whose area is 346.5 sq cm?

17. What is the diameter of a circle whose area is 3850 sq m?

18. What is the diameter of a circle whose area is 301.84 sq m?

19. What is the diameter of a circle whose area is 24.64 sq m?

20. What is the area of a circle whose circumference is 96.8 m?