Question

The Cunninghams are moving across the country. Mr. Cunningham leaves 4 hours before Mrs. Cunningham. If he averages 35mph and she averages 70mph, how long will it take Mrs. Cunningham to overtake Mr. Cunningham?

Answer 1

Answer:

Remember, distance traveled is the rate times the time.  (d = rt)   Mrs. Cunningham will overtake Mr. Cunningham when they have traveled the same distance.  

 

Mrs. Cunningham's equation will be: d = 60t

 

Since he was traveling 4.5 hours longer, Mr. Cunningham's equation will be: d = 50(t + 4.5)

 

If the travel the same distance, the equations can be set equal to each other:

 

60t = 50(t + 4.5)

60t = 50t + 225

10t = 225

t = 22.5

Step-by-step explanation: