What a clever sneaky little problem !
There can only be two of them: 1221 and 2112 .
Answer:
B is the right answer
Step-by-step explanation:
The difference between the volume of a sphere and a cylinder is 2/3
take 30 x 2 = 60
60/3 = 20
The Volume of the Sphere is 20 m ^3
Hope this helps.
Step-by-step explanation:

I need help my self lol XD