please help me
Kent has two similar cylindrical pipes, Pipe A and Pipe B. The radius of Pipe A is 6 cm, and the radius of Pipe B is 2 cm. What is the ratio of the volume of Pipe A to the volume of Pipe B? (1 points)

3:1
9:1
27:1
81:1

Question

please  help me 
Kent has two similar cylindrical pipes, Pipe A and Pipe B. The radius of Pipe A is 6 cm, and the radius of Pipe B is 2 cm. What is the ratio of the volume of Pipe A to the volume of Pipe B? (1 points)

 	
	3:1
	9:1
	27:1
	81:1

anonymous · Answer

oh i think its A because 6/2=3 and 2/2=1 which = ratio 3:1

anonymous · Answer

try 9/1
vol=pi*h*r^2      A=pi*h*6*6=36
                           B=pi*h*2*2=4............ratio  36/4=9/1

anonymous · Answer

and where did u get all of that?

anonymous · Answer

@mathstudent55 could you help me out here a bit

anonymous · Answer

that's the standard volume of a cylinder..... area of the circle * height 
area of circle is pi*r^2
when i forget i just google for the  formula
this site is good for answering particular questions but many other sites will cover the topic better   for instance purplemath.com will explain how to find volumes etc.