Solve.
-An express train travels 334 miles between two cities. During the first 126 miles of a trip, the train traveled through mountainous terrain. The train traveled 10 miles per hour slower through mountainous terrain than
Through level terrain. If the total time to travel between the cities was 7 hours, find the speed of the train on
Level terrain.
A) 42 mph
B) 62 mph
C) 52 mph
D) 32 mph

Question

Quizplus · Accepted Answer

Let the speed on level terrain be x mph. Then, the speed through mountainous terrain is (x - 10) mph. The time for the mountainous part is 126/(x - 10) hours, and for the level part is (334 - 126)/x hours. The total time is 7 hours: 126/(x - 10) + 208/x = 7. Solving this equation gives x = 52 mph.

Solve. -An Express Train Travels 334 Miles Between Two Cities. During