Question 588744
There are at least three possibilities.
1)They won't ever crash because the train conductors are not as ignorant as you or your teachers think.

2)if the times are not local times.
65*(3+x)+60x=1725
x = 306/25=12.24 hours

3)If the times are local then you have to adjust since Denver and Philadelphia are two hours apart.
So add two hours to Denver to get equivalent Philadelphia time so there is only an hour difference now
65*(1+x)+60x=1725
x = 332/25=13.28 hours