# Joan left Durham traveling 85 mph. Mike,to catch up,left some time later driving at 94 mph. Mike caught up after 7 hours. How long was Joan driving before Mike caught up?

##### 1 Answer

Joan had been driving for

#### Explanation:

*Before we start we should immediately note that

Firstly let's call the place where the two people meet

To get to point

To get to point

Mike has given us both

-Rearrange the formula :

We now know that the point they both meet at (which we called

We now know the

-Rearrange the formula:

Now all that remains for us to do is work out how many minutes Joan has been travelling for.

Joan has therefore been travelling for