The length of the new room is 4 inches.
The formula for volume of a cube is given by;
V = l³
where;
V is volume
l is side length of cube
Now, we are given;
Volume of cube = 64 in³
Thus;
l³ = 64
l = ∛64
l = 4 inches
Thus, we conclude that the length of the new room is 4 inches.
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