Answer:
The speed of the commuter train is approximately 69.333 Km/hr
Step-by-step explanation:
Speed of the train can be calculated using the following rule:

Note that the question requires the speed to be calculated in units kn/hour. Therefore, we should ensure proper units used
We are given that:
Distance covered by the train = 52 km
Time taken to cover this distance = 45 minutes which is
hours
Now, we substitute with these givens in the above equation to get the speed of the train
This can be done as follows:
Km/hr
Hope this helps :)