Question

What is the length of the diameter of the base of a cylinder if its volume is 768Pi cubic inches and its height is 12 inches

Answer 1

V = pi*r^2*h

768pi = pi*r^2*12


solve for r, then use the value of r to find d = 2r

Answer 2

I dont know how to solve for r

Answer 3

768pi = pi*r^2*12

768pi/pi = pi*r^2*12/pi

768 = 12r^2

12r^2 = 768

how about now?

Answer 4

12r/12=27.7/12
r=2.3
Am i right?

Answer 5

12r^2 = 768

r^2 = 768/12

r^2 = 64

r = ???

Answer 6

r=8 !

Answer 7

yep

Answer 8

so the answer is 8?

Answer 9

correct

Answer 10

oh wait

Answer 11

Thankssss

Answer 12

the radius is 8

Answer 13

the diameter isn't 8 though

Answer 14

oh, the diameter is 16. d=2r

Answer 15

yep you got it