Answer: Car B will catch up with A when the distance travel by the two are equal
Recall Speed = Distance/Time
Distance =Time * Speed
Car A; D=60T1
Car B; D=70T2
Where T1= T2+1
60T1=70T2
60(T2+1)= 70T2
60T2+60=70T2
10T2=60
T2=6hrs
4pm +6hrs
10pm car B catches up with A
Explanation: