Question

*If a train travels at a constant velocity of 60 km per hour for 5 hours continuously, then the acceleration achieved by this train is ______ .*

1️⃣ positive
2️⃣ negative
3️⃣ zero
4️⃣ positive and negative​

Answer 1

Answer:

Let distance from A to B=x  km= distance from B to A.

Time taken by train from A to B =60x hr 

Time taken by train  from B to A =80x hr

Total time taken by train =60x+80x=2407x hr

average speed=total timetotal distance=2407x2x=7480 km h−1