Word Problem Need Help!!

[nvercel2]

A train leaves a station at 1PM on a 300 mile journey. It stops at a station every 100 miles to take on more passengers. The onboarding process takes 20 minutes. After each additional load of passengers, the train travels 10 % slower than its previous speed. At what time does the train reach its destination?

 

[soroban]

Hello, nvercel2!

A train leaves a station at 1PM on a 300-mile journey.
It stops at a station every 100 miles to take on more passengers.
The onboarding process takes 20 minutes.
After each additional load of passengers, the train travels 10% slower than its previous speed.
At what time does the train reach its destination?

I don't suppose there is any additional information . . . like the original speed of the train?