Multiple choice

The ratio of the area of a circle to its diameter is 22 :1.What is the measure of its radius?

  1. 16 units

  2. 22 units

  3. 14 units

  4. 18 units

  5. None of these

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Area of circle = πr², diameter = 2r. Given πr² : 2r = 22 : 1, so πr/2 = 22, meaning r = 44/π. Using π ≈ 22/7: r = 44/(22/7) = 44 × 7/22 = 14 units.