To solve a problem like this, we can setup a basic algebraic equation.
52+14=x
66=x
We know this equation is true because 14 years ago, she was 52 so 14 years later, she is 66.
5+25=48 becase you add 12 each time
Given that,
Speed of first bicycle = 9 mph
Speed of second bicycle = 5 mph
Suppose the length of the circle 24 miles.
We need to find the relative velocity
Using formula of relative velocity

Put the value into the formula


We need to calculate the time
Using formula of time



We need to calculate the distance of the points where the two bicycles meet
Using formula of distance
For first bicycles,


For second bicycles,


Hence, The points where the two bicycles meet after every 6hr at 30 miles and 54 miles.
Subtract 58 from 93, it's 35
5.89 is rounded to 6 as a whole number.