Multiple choice

If the radius of the base of a cylinder is $2$ cm and its height $7$ cm, then its curved surface is

  1. $44 cm^2$
  2. $22 cm^2$
  3. $88 cm^2$
  4. $56 cm^2$
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C Correct answer
Explanation

Curved surface area of a cylinder = 2 * pi * r * h = 2 * 3.14159 * 2 * 7 = 28 * pi = 87.96, which rounds to 88 cm^2.

AI explanation

The curved surface area of a cylinder is calculated using the formula 2*pi*r*h. Substituting the radius of 2 cm and height of 7 cm gives 2 * (22/7) * 2 * 7. This simplifies to 2 * 22 * 2, which equals 88 cm^2.

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