mjchey
Answered

At Westonci.ca, we make it easy to get the answers you need from a community of informed and experienced contributors. Explore comprehensive solutions to your questions from a wide range of professionals on our user-friendly platform. Our platform provides a seamless experience for finding reliable answers from a network of experienced professionals.

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 :

Scryt
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
Thanks for using our platform. We're always here to provide accurate and up-to-date answers to all your queries. Your visit means a lot to us. Don't hesitate to return for more reliable answers to any questions you may have. Keep exploring Westonci.ca for more insightful answers to your questions. We're here to help.