Answer:
15 and 5 hours.
Step-by-step explanation:
Call x the time taken by the first chap, and y the second.

Let's divide by 5 and play with the LHS of the first equation a bit:
we know how much x+y is ( first equation!) let's solve.
At this point it's easy to check that 
80+70=150
270/150=1.8 hours before the two trains are 270 miles apart
☺☺☺☺
None of those are correct. x= 8 and 2/3
Answer:
<h2>YES</h2><h2>NO</h2><h2>YES</h2><h2>NO</h2>
Step-by-step explanation:
