A cattle train left Miami and traveled toward
New York. 14 hours later a diesel train left
traveling at 45 km/h in an effort to catch up
to the cattle train. After traveling for four
hours the diesel train finally caught up.
What was the cattle train's average speed

Question

A cattle train left Miami and traveled toward
New York.  14 hours later a diesel train left
traveling at 45 km/h in an effort to catch up
to the cattle train.  After traveling for four
hours the diesel train finally caught up. 
What was the cattle train's average speed

anonymous · Answer

Speed = Distance / Time
(Distance is the same for both trains)

Speed * Time = Distance

S1 = s
T2 = 14+4 hours = 18 hours

S2 = 45
T2 = 4

s*18 = 45*4
s = 180/18

s = 10km/h