Multiple choice

The curved surface area of a right circular cone is 22 cm2. If the slant height of the cone is 7 cm, then find its base radius.

  1. 5 cm

  2. 1 cm

  3. 2 cm

  4. 3 cm
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The curved surface area of a cone is given by pi*r*l, where r is the radius and l is the slant height. Given 22 = (22/7) * r * 7, we find 22 = 22 * r, so r = 1 cm.

AI explanation

The formula for the curved surface area of a cone is πrl, where r is the radius and l is the slant height. Substituting the given values gives (22/7) * r * 7 = 22. Solving for r gives 22r = 22, which means the base radius is 1 cm.

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