Hi guys,

I need some help with a question that i just cant figure out how to solve. I have tried a lot but it does not seem to help. I am looking around and there is some complex math so i am guessing this might be a no brain-er for you guys.

Anyways the question is,

Two Trains travel a 105 km track each day. The express travels 10kmph faster and takes 30 minutes less than the normal train does. Find the speed of the express.

The answer is : 51.1 km/h ( the answer book tells me that)

I need to know how to solve to get to that answer. I cant find a way.

Thanks in advance, please get to me as soon as you guys can.

Thanks.

- Cluelessgeorge