Multiple choice

There are two circles of radii $6cm$ and $15cm$ respectively. What percent is the area of the greater circle of the area of smaller circle?

  1. $525$%
  2. $625$%
  3. $6.25$%
  4. $5.25$%
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Area of greater circle = pi * 15^2 = 225pi. Area of smaller circle = pi * 6^2 = 36pi. Percentage = (225pi / 36pi) * 100 = 6.25 * 100 = 625%.

AI explanation

The area of the smaller circle is 6^2 = 36 and the area of the greater circle is 15^2 = 225. To find the required percentage, calculate (225 / 36) * 100, which results in 625%.

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