Multiple choice

The radius of circle is 3.5 cm . What is the area of circle ?

  1. $42.5 cm2$
  2. $48.5 cm2$
  3. $36.5 cm2$
  4. $38.5 cm2$
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Area of circle = πr². Using π = 22/7 (when radius is multiple of 0.7): Area = (22/7) × 3.5² = (22/7) × 12.25 = 22 × 1.75 = 38.5 cm². Using π = 22/7 instead of 3.14 gives exact calculation when radius is 3.5.

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