Multiple choice

If the radius and slant height of a right circular cone are $4$ cm and $7$ cm respectively, then its curved surface area will be

  1. $78 cm^2$
  2. $87 cm^2$
  3. $88 cm^2$
  4. $74 cm^2$
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The curved surface area of a cone is given by pi*r*l. Using pi = 22/7, r = 4, and l = 7, the area is (22/7) * 4 * 7 = 88 cm^2.

AI explanation

The curved surface area of a right circular cone is calculated using the formula pi times the radius times the slant height. Substituting the given values into the formula gives 22 over 7 multiplied by 4 and 7. This results in a curved surface area of 88 square centimeters.

Keep practicing — related questions