1. Cost of a Ball

If a bat & a ball cost R1.10 but the bat cost R1 more than the ball, what is the cost of the ball?

2. What is the answer

11 = 20

87 = 151

92 = 117

63 = 93

72 = ??

Answers

1. Cost of the ball = 5 cents

2. 72 = 95