Answer:
2 hours
Step-by-step explanation:
Let t represent the anount of time traveled by Chelsea
Katie
d= 18t
Chelsea
d= 6(4+t)
18t= 6(4+t)
18t= 24+6t
18t-6t= 24
12t= 24
Divide bith isdes by the coefficient of t which is 12
t= 24/12
t= 2
Hence Katie will have to travel for 2 hours before catching up with Chelsea,
