Tourists covered 255 km for a 4-hour ride by car and a 7-hour ride by train. What is the speed of the train, if it is 5 km/h greater than the speed of the car?

Let the speed of car be x km/h

speed of train=x+5 km/h

distance=speed*time

thus distance covered by car:

x*4=4x km

distance covered by train:

7 (x+5) km

total distance:

4x+7x+35=255

11x=255-35

11x=220

x=20 km/h

speed of train=20+5=25 km/hr