Capacity of the tank =1000 cc
Which means the volume of the tank =1000 cm3
If the side of the tank =s cm,
We can find the side of a tank from the volume of a tank as follows
Then, s3=1000
⟹s=3√1000=3√10×10×10=10 cm
Thus, the lateral surface area of the cube =4×s2=4×10×10=4×100=400 cm2