Which representation does not show the relation as the others

Carson has only $20 bills and $10 bill in her wallet. the total value of the bills is $50. she has 1 more $20 bill than $10 bills. how many each kind of bill does carson have? a. one $20 and two $10 bills b. two $20 bills and one $10 bill c. one $20 bills and three $10 bills d. two $20 bills and two $10 bills

Math it's appreciated. (picture provided)

What is the similarity ratio of a cube with volume 729m^3 to a cube with volume 3375 m^3