Question

A train travels total distance of 200 km . for 40 km it takes 1 hr next 100 km it takes 1.5 hr and the rest with some speed . If average speed of the train for entire journey is 60km/hr find speed of the train in the last part of the journey.

Answer 1

Total distance =200
Let the journey of last part=x
Total speed =40+100/90+x=60
370+9x=600
9x=230
x=25.55

Answer 2

Answer:

Explanation:

Total distance =200

Let the journey of last part=x

Total speed =40+100/90+x=60

370+9x=600

9x=230

x=25.55