What is volume of a cylinder with base area 64pi cm2 and a height equal to twice the radius? Give your answer in terms of pi



a
256pi
b
512pi
c
4096pi
d
1024pi

Respuesta :

Answer:

Volume of cylinder, [tex]V=1024\pi\ cm^3[/tex]

Step-by-step explanation:

Given that,

Area of base of a cylinder, [tex]A=64\pi\ cm^2[/tex]

Height, [tex]h=2r[/tex], twice of radius

We know that the base area of the cylinder is in the form of a circle. So,

[tex]\pi r^2=64\pi\\\\r=8\ cm[/tex], r is radius of circle.

Height of cylinder becomes, h = 2r = 16 cm

Now the volume of cylinder is given by :

[tex]V=\pi r^2\times h\\\\V=A\times h\\\\V=64\pi\times 16\\\\V=1024\pi\ cm^3[/tex]

So, the correct option is (d).