please help!!
Mary has a cone that has a radius of 5cm and height of 10cm. James has a pyramid with base length of 10cm and height of 5cm. Which solid has a larger volume?

Respuesta :

Answer:

The cone has a larger volume.

Step-by-step explanation:

The volume of a cone is given by:

[tex] V_{c} = \frac{1}{3}\pi r^{2}h_{c} [/tex]

Where:

r: is the radius = 5 cm

[tex]h_{c}[/tex]: is the height of the cone = 10 cm

Then, the volume of a cone is:

[tex] V_{c} = \frac{1}{3}\pi (5 cm)^{2}*10 cm = 261.8 cm^{3} [/tex]

Now, the volume of a pyramid is:

[tex]V_{p} = \frac{1}{3}A_{b}*h_{p}[/tex]

Where:

[tex]A_{b}[/tex]: is the area of the base  

[tex]h_{p}[/tex]: is the height of the pyramid = 5 cm

The area of the base can be calculated as follows:

[tex] A_{b} = l^{2} = (10 cm)^{2} = 100 cm^{2} [/tex]

Hence, the volume of the pyramid is:

[tex]V_{p} = \frac{1}{3}100 cm^{2}*5 cm = 166.7 cm^{3}[/tex]

Therefore, the cone has a larger volume.

I hope it helps you!