Answer:
B.
Step-by-step explanation:
I think your question is missed of key information, allow me to add in and hope it will fit the original one. Â
Please have a look at the attached photo. Â
My answer:
As given in the question, we know that:
The ratio of the area of the circle to the area  of the square is π/4
V = 1/3*the height*the base area
<=> V1 = 1/3*h*Ï€[tex]r^{2}[/tex]
V2 = 1/3*the height*the base area
<=> V = Â 1/3*h*4[tex]r^{2}[/tex]
=> the ratio of volume of the cone to the pyramid is:
= [tex]\frac{V1}{V2}[/tex]
= (1/3*h*Ï€[tex]r^{2}[/tex] ) / ( 1/3*h*4[tex]r^{2}[/tex] )
= π/4
S we can conclude that the volume of the cone equals π/4  the volume of the  pyramid
Hope it will find you well.