Answer : The volume blue prism in Model 1 is, 
Step-by-step explanation :
As we are given that:
Volume of Model 1 = Volume of Model 2
Given:
Volume of blue prism in Model 2 = 
Volume of orange prism in Model 2 = 
Volume of orange prism in Model 1 = 
Now we have to calculate the total volume of Model 2.
Total volume of Model 2 =
= 
Now we have to calculate the volume blue prism in Model 1.
Volume of Model 1 = Volume of Model 2
Volume of orange prism in Model 1 + Volume blue prism in Model 1 = Total volume of Model 2
+ Volume blue prism in Model 1 = 
Volume blue prism in Model 1 = 
Volume blue prism in Model 1 = 
Thus, the volume blue prism in Model 1 is, 