A train travels 40 km/hr for 0.2 hr, 50km/hr for next 0.2hr and 60km/hr for next 0.4 hr.calculate the average speed of train.

My Solution:-1st hr. distance=40 multiplied by 0.2=8km
2nd hr.= 50 multiplied by 0.2=10km
3rd hr. =60 multiplied by 0.4=24 km
Average speed=10+24+8 divided by 0.8=52.5 km
IS IT RIGHT

yes!

To calculate the average speed of the train, we need to find the total distance traveled and divide it by the total time taken.

In this case, the train travels at different speeds for different durations. So, we need to calculate the distance traveled at each speed and then add them up to get the total distance.

Let's calculate the distance traveled at each speed:

Distance in 1st hour = 40 km/hr * 0.2 hr = 8 km
Distance in 2nd hour = 50 km/hr * 0.2 hr = 10 km
Distance in 3rd hour = 60 km/hr * 0.4 hr = 24 km

Now, let's calculate the total distance:

Total distance = 8 km + 10 km + 24 km = 42 km

Next, we need to calculate the total time taken:

Total time = 0.2 hr + 0.2 hr + 0.4 hr = 0.8 hr

Finally, we can calculate the average speed:

Average speed = Total distance / Total time = 42 km / 0.8 hr = 52.5 km/hr

So, your solution is correct. The average speed of the train is 52.5 km/hr.