Two trains leave the station at the same time, one heading west and the other east. The westbound train travels at
85
miles per hour. The eastbound train travels at
95
miles per hour. How long will it take for the two trains to be
216
miles apart?

Question

Two trains leave the station at the same time, one heading west and the other east. The westbound train travels at 
85
 miles per hour. The eastbound train travels at 
95
 miles per hour. How long will it take for the two trains to be 
216
 miles apart?

madhu.mukherjee.946 · Answer

The two trains are moving away from each other.
train 1 speed = 85 mph
train 2 speed = 95 mph.

madhu.mukherjee.946 · Answer

combined speed = 190 mph

madhu.mukherjee.946 · Answer

distance = 216 miles
t=d/r
t=216/190
t = 1.136 hours
After 1.136 hours they will be 216 miles apart

madhu.mukherjee.946 · Answer

we used the formula 
           distance=time *speed

madhu.mukherjee.946 · Answer

@mm41 do you understand?