Mjcheyidn
Answered

IDNLearn.com connects you with a community of experts ready to answer your questions. Our experts are available to provide accurate, comprehensive answers to help you make informed decisions about any topic or issue you encounter.

help me wit these 3 questions plz.

A cone has a base radius of 7 centimeters and a height of 21 centimeters.

 

What is the volume of the cone?

        A.

28π cm3

      B.

49π cm3

      C.

147π cm3

      D.

343π cm3

Help Me Wit These 3 Questions Plz A Cone Has A Base Radius Of 7 Centimeters And A Height Of 21 Centimeters What Is The Volume Of The Cone A 28π Cm3 B 49π Cm3 C class=
Help Me Wit These 3 Questions Plz A Cone Has A Base Radius Of 7 Centimeters And A Height Of 21 Centimeters What Is The Volume Of The Cone A 28π Cm3 B 49π Cm3 C class=

Sagot :

Scrytidn
1. Cone

[tex]r=7cm[/tex]
[tex]h=21cm[/tex]

[tex]V= \frac{\pi*r^2*h}{3}=\frac{\pi*7^2*21}{3}=7^2*7*\pi=7^3\pi=343{\pi}cm^3[/tex]

Answer: D

2. Cylinder

[tex]r=5ft[/tex]
[tex]h=16ft[/tex]

[tex]V= \pi*r^2*h=\pi*5^2*16=25*16\pi=400\pi ft^3[/tex]

Answer: A

3.Pyramid

In this case it will be

[tex]V= \frac{a*b*h}{3}[/tex]

[tex]a=9ft[/tex]
[tex]b=4ft[/tex]
[tex]h=12ft[/tex]

[tex]V= \frac{4*9*12}{3}=4*3*12=144 ft^3[/tex]

Answer: B
We are happy to have you as part of our community. Keep asking, answering, and sharing your insights. Together, we can create a valuable knowledge resource. IDNLearn.com is committed to providing accurate answers. Thanks for stopping by, and see you next time for more solutions.