Final answer:
To find the original speed of the train, set up an equation and solve for 'x'.
Step-by-step explanation:
To find the original speed of the train, we can use the formula speed = distance / time.
Let's assume the original speed of the train is 'x' km/h.
According to the given information, the train covers a distance of 360 km at its original speed and takes a certain amount of time. If the speed was 5 km/h faster, it would have taken 48 minutes less for the journey.
We can form the equation: 360 / x - 360 / (x + 5) = 48 / 60.
Now, solve this equation to find the value of 'x', which will be the original speed of the train.