Final answer:
To make the parts equal in volume, Velma and Bruce can change each building part by making their dimensions proportional to the original dimensions. The volume of Block B should be 4 times the volume of Block A.
Step-by-step explanation:
To make the parts equal in volume, Velma and Bruce can change each building part by making their dimensions proportional to the original dimensions.
Let's say Block A has a volume of L x 2L x L and Block B has a volume of 2L x 2L x 2L.
The change in volume of Block B should be 4 times the change in volume of Block A because the volume is proportional to the original volume.