Answer:
16 units is the length.
Step-by-step explanation:
To solve this we first have to calclate the volume of th square box:
10 units * 10 units * 4 units= 400 units^3
The volume of the square box is 400 cubic units, if the rectangle box you know that it has double the volume: 400*2= 800 cubic units.
So we just have to clear the formula of the volume for length:
Volume= Lenght * Width * Height
Volume= Length * 5 units * 10 units
800/ 50 square units= Length
Length= 16 units.
