69. Faulty Locomotive. We set off by railway from Angchester to Clinkerton. But an hour after the train started, a locomotive malfunction was discovered. We had to continue the journey at a speed that was $\frac{3}{5}$ of the original. As a result, we arrived in Clinkerton 2 hours late, and the driver said that if the malfunction had occurred 50 miles further, the train would have arrived 40 minutes earlier.

What is the distance from Angchester to Clinkerton?
69. The distance from Angchester to Clinkerton is 200 miles. The train traveled 50 miles at a speed of 50 miles/h and 150 miles at a speed of 30 miles/h. If the breakdown had occurred 50 miles further, the train would have traveled 100 miles at a speed of 50 miles/h and 100 miles at a speed of 30 miles/h.