Car A leaves a destination at 3 P. M. and travels 60 kph. Car B

leaves the same destination and travels the same route as Car A at 4 P. M. and travels 70 kph. At what time will Car B catch up to Car A?

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