Answer:
D.
Step-by-step explanation:
Density = mass / volume
Density= 3 , mass = 80
3 = 80 / volume
Volume = 80 / 3
Volume = 26.67 cubic inch
Now volume of a cube= 3 (side length)
26.67 = 3(side length)
Side length=26.67 /3
Side length=8.89 inches
Side length ≈ 9 inches
