Answer:
2 times.
Explanation:
We have been given that the volume for 3d pyramid a is 
 and the volume for 3d pyramid b is
 and the volume for 3d pyramid b is 
 .
.
To find the volume of b is how many times greater than volume of pyramid a we will use proportions.




Therefore, the volume of pyramid b is 2 times the volume of pyramid a.