Multiple choice

Find the perimeter of a circular plot which occupies an area of $154$ square metres.

  1. $33m$
  2. $22m$
  3. $38m$
  4. $44m$
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Area = pi * r^2 = 154. r^2 = 154 / (22/7) = 49. r = 7. Perimeter (circumference) = 2 * pi * r = 2 * (22/7) * 7 = 44 m.

AI explanation

Using the area formula Area = (22/7) * radius^2 = 154, we find the radius by solving radius^2 = 154 * (7/22) = 49, so the radius is 7 m. The perimeter, or circumference, is calculated as 2 * (22/7) * 7, which equals 44 m.

Keep practicing — related questions