A train travels at 50 km/h for 2 hours then slows down to do the last 30 minutes of its journey at 40km/h. What is the average speed of the train over the whole journey?
Do not multiple post the same question. Next time they might all be deleted.
If your question moves to the second page then you can repost but you should indicate that that is what you are doing.
50km/hr for 2 hours IS 100km in 2hours
40km/hour for 1/2 an hour is 20km in 1/2hour
total
120km in 2.5 hours
$${\frac{{\mathtt{120}}}{{\mathtt{2.5}}}} = {\mathtt{48}}$$
average speed is 48km/hour
