A professional baker uses a chocolate mold to make decorations

for cakes. One chocolate mold is in the shape of a cone and has a
diameter of 2 cm and a height of 6 cm. What volume of chocolate,
in cubic centimeters, is needed to make a solid chocolate cone?
Use 3.14 for π. (1 point)
18.84 cubic centimeters
37.68 cubic centimeters
6.28 cubic centimeters
12.56 cubic centimeters

1 answer

To find 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, and \(h\) is the height of the cone.

Given:

  • The diameter of the cone is 2 cm, so the radius \(r\) is half of the diameter: \[ r = \frac{2}{2} = 1 \text{ cm} \]
  • The height \(h\) of the cone is 6 cm.

Now plug the values into the volume formula:

\[ V = \frac{1}{3} \times 3.14 \times (1^2) \times 6 \]

Calculating it step-by-step:

  1. Calculate \(r^2\): \[ r^2 = 1^2 = 1 \]

  2. Substitute into the formula: \[ V = \frac{1}{3} \times 3.14 \times 1 \times 6 \] \[ V = \frac{1}{3} \times 3.14 \times 6 \]

  3. Calculate \(3.14 \times 6\): \[ 3.14 \times 6 = 18.84 \]

  4. Finally, calculate \(\frac{1}{3} \times 18.84\): \[ V = \frac{18.84}{3} = 6.28 \]

Thus, the volume of chocolate needed to make a solid chocolate cone is:

\[ \boxed{6.28 \text{ cubic centimeters}} \]