A jar of peanut butter has a height of 16 centimeters and a width of 10 centimeters. Find the volume of the peanut butter jar. Use 3.14 for pi.

1. 5,024 cubic centimeters
2. 2,009.6 cubic centimeters
3. 4,019.2 cubic centimeters
4. 1,256 cubic centimeters

1 answer

To find the volume of the jar of peanut butter, we can model it as a cylinder. The formula for the volume \( V \) of a cylinder is given by:

\[ V = \pi r^2 h \]

where:

  • \( r \) is the radius of the base,
  • \( h \) is the height of the cylinder,
  • \( \pi \) is approximately 3.14.

Given:

  • The height \( h = 16 \) cm,
  • The width (diameter) of the jar is 10 cm, so the radius \( r \) is half of that:

\[ r = \frac{10}{2} = 5 \text{ cm} \]

Now we can substitute the values into the volume formula:

\[ V = 3.14 \times (5)^2 \times 16 \]

Calculating \( (5)^2 \):

\[ (5)^2 = 25 \]

Now substitute back into the formula:

\[ V = 3.14 \times 25 \times 16 \]

Calculating \( 25 \times 16 \):

\[ 25 \times 16 = 400 \]

Finally, multiply:

\[ V = 3.14 \times 400 = 1,256 \]

Thus, the volume of the peanut butter jar is:

\[ \boxed{1,256} \text{ cubic centimeters} \]

Therefore, the correct answer is option 4. 1,256 cubic centimeters.