What is the volume in cubic inches of a cone with a diameter of 6 inches and height of 7 inches use 3.14 for pi round your answer to the nearest hundredth

1 answer

To calculate the volume of a cone, you can use the formula:

\[ V = \frac{1}{3} \pi r^2 h \]

where \( V \) is the volume, \( r \) is the radius, \( h \) is the height, and \( \pi \) is approximately 3.14.

  1. Find the radius: The diameter of the cone is 6 inches, so the radius \( r \) is:

\[ r = \frac{diameter}{2} = \frac{6}{2} = 3 \text{ inches} \]

  1. Plug in the values: The height \( h \) is given as 7 inches. Now, substitute \( r \) and \( h \) into the volume formula:

\[ V = \frac{1}{3} \cdot 3.14 \cdot (3)^2 \cdot 7 \]

  1. Calculate \( r^2 \):

\[ r^2 = 3^2 = 9 \]

  1. Now substitute \( r^2 \) into the volume formula:

\[ V = \frac{1}{3} \cdot 3.14 \cdot 9 \cdot 7 \]

  1. Calculate \( 9 \cdot 7 = 63 \):

\[ V = \frac{1}{3} \cdot 3.14 \cdot 63 \]

  1. Calculate \( 3.14 \cdot 63 \):

\[ 3.14 \cdot 63 = 197.82 \]

  1. Now calculate \( \frac{1}{3} \cdot 197.82 \):

\[ V = \frac{197.82}{3} \approx 65.94 \]

So, the volume of the cone is approximately \( \boxed{65.94} \) cubic inches, rounded to the nearest hundredth.