Question 278871
You got any popcorn? May take a while. 
First, how much time elapsed in order for me to go 25 miles at a rate of 60mph?
This is 25 minutes!
Rate TIMES Time = Distance, 
NOW, Five hours after mother has caught up to me, I have traveled 5 hours and 25 minutes, or for the sake of computation, I have travelled 60/12+5/12 hours or 65/12 hours.
Now 60 mph TIMES 65/12hours=325 miles!!!!
 
But, we want to know what speed mother travelled to go 325 miles in five hours,
Rate TIMES Time = Distance
? (5)=325 miles
?=mother's speed=65 MPH!! Don't hog the popcorn!! LOL Have a great day!!!