I just don't understand

Planning for the possibility that your home might get struck by lighting and catch on fire is part of a plan

10 ! a train starts from grand city and travels toward belleville 388 miles away. at the same time, a train starts from belleville and runs at the rate of 47 miles per hour toward grand city. they pass each other 4 hours later. find the rate of the train from grand city.

Can someone check if i did this right since i really want to make sure it’s correct. if you do you so much