A train travels 250 km partly at a speed of 20 km/hr and the remaining
| A train travels 250 km partly at a speed of 20 km/hr and the remaining at a speed of 45 km/hr. If the speeds are reversed then it travels 20 km more at the same time. Then find the average speed of the train to travel 250 km?
Right Answer is: D
Let train travel with 20 km/hr for x hours and with 45 km/hr for y hours .
Average speed =