Question

Two trains leave the station at the same time, one heading east and the other west. The eastbound train travels at 90
miles per hour. The westbound train travels at 80 miles per hour. How long will it take for the two trains to be 408 miles
apart?
Do not do any rounding.

Answer 1

x = # of hours

80x + 90x = 408

Combine like terms.

170x = 408

Divide both sides by 408

x = 2.4 hours

It will take the trains 2.4 hours to be 408 miles apart.