Problema Solution
If Gina leaves now and drives at 66 km/h, she will reach Alton just in time for her appointment. On the other hand, if she has lunch first and leaves in 40 minutes, she will have to drive at 90 km/h to make her appointment. How far away is Alton?
Answer provided by our tutors
Let x be the distance and t be the time.
x= 66t for first case
x= (t-40/60)90 for second case
By first t=x/66
Plug in in second
x= (x/66-40/60)90
Solve for x; x= 165 km