Recall your d = rt, distance = rate * time.
notice, the distance are the same, say it was "d" miles.
and if car A is travelling at a speed of say "r" mph, then B is going at "r+15" mph.

how far is B going? well, r + 15.
Answer: 59$
Step-by-Step Explanation:
Let the discounted rate be ‘x’
No. of visits = 4
Total Amount for the visits = 4 * x = 4x
Additional cost = 25$
Total Amount = 261$
Therefore,
= 4x + 25 = 261
= 4x = 261 - 25 = 236
=> x = 236/4 = 59
Therefore, x = 59
Hence, discounted rate = 59$
Each ticket sold yields 9$ of profit
The answer is,

Also equivalent to about, 0.185188.