A train ticket has a perimeter of 30 centimeters. Its area is 50 square centimeters. What are the dimensions of the ticket?

Can some one me, i’ve been asking for so long

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

Can someone tell me if this is perpendicular? !