Multiple choice

Calculate the volume of a cone whose radius is $20$ cm and height is $21$ cm. (use $\displaystyle \pi =\frac { 22 }{ 7 } )$

  1. $\displaystyle 8600{ cm }^{ 2 }$
  2. $\displaystyle 8800{ cm }^{ 3 }$
  3. $\displaystyle 7800{ m }^{ 3 }$
  4. $\displaystyle 9800{ cm }^{ 9 }$
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Volume of a cone = (1/3) * pi * r^2 * h. Given r = 20, h = 21, pi = 22/7. Volume = (1/3) * (22/7) * 20^2 * 21 = (1/3) * 22 * 400 * 3 = 8800 cm^3.

AI explanation

Using the cone volume formula V = 1/3*pi*r^2*h, substitute the radius 20 and height 21. Using pi = 22/7 gives 1/3 * 22/7 * 20^2 * 21 = 8800 cm^3.

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