Answer:
2 times.
Step-by-step explanation:
We have been given that the volume for 3d pyramid a is \(400\text{ cm}^3\) and the volume for 3d pyramid b is \(800\text{ cm}^3\).
To find the volume of b is how many times greater than volume of pyramid a we will use proportions.
\(\frac{\text{Volume of pyramid b}}{\text{Volume of pyramid a}}=\frac{800\text{ cm}^3}{400\text{cm}^3}\)
\(\frac{\text{Volume of pyramid b}}{\text{Volume of pyramid a}}=2\)
\(\frac{\text{Volume of pyramid b}}{\text{Volume of pyramid a}}*\text{Volume of pyramid a}=2*\text{Volume of pyramid a}\)
\(\text{Volume of pyramid b}=2*\text{Volume of pyramid b}\)
Therefore, the volume of pyramid b is 2 times the volume of pyramid a.
