The circumference of circle B is 48. The circumference of circle A is 12.
How many times greater is the area of circle B than the area of circle A?
A) 4 times greater
B) 8 times greater
C) 16 times greater
D) 48 times greater

Mr and mrs smith buy tickets for themselves and their four children. the cost of an adult ticket is ? 6 more than the adult ticket. the total cost of the six tickets is ? 40.50 work out the cost of an adult ticket. in your working let c be the cost of the child ticket and a be the cost of the adult ticket.