Question 204148
Answer 204148 from Length and distance

Speed is defined as Distance per unit Time i.e S = D / T

thereore D = S X T

The differnce between the speed of the two trains is 40 - 35 = 5 km/h
The time difference is 1 hr

thus, S= 5 km/h and T = 1 hr

D = S X T

D = 5 X 1

D  = 5 km 

Therefore the faster train will catch the slower train in  5 km.