Question

#2). A train averaging 50mph leaves San Francisco at 1pm for Los Angeles 440 miles away. At the same time a second train leaves Los Angeles headed for San Francisco on the same track and traveling at an average rate of 60 mph. At what time does the accident occur?

Answer 1

$\begin{gathered} t=\frac{440}{50+60} \\ t=\frac{440}{110} \\ t=4\text{ hours} \\ \text{They will m}et\text{ at accident after 4 hour after starting time.} \\ \text{That's means }\Rightarrow1P\colon M+4hours=5P\colon M \\ At\text{ 5P:M, they will m}et\text{ at accident} \end{gathered}$